One day ladies will be walking their
computers in the park and saying
'do you know, my iittie computer
said a very funny thing to me this morning'.
In 1952, the greatest
mathematician of his time
the man who gave birth to the
computer age was in torment.
He was a recently convicted criminal.
In distress, he turned to a psychiatrist.
So what did you say to the police?
I told them I'd been having
an affair with Arnold Murray
and that he'd given my
address to a young man
who was known to burgle
men he'd met for sex.
This man was Alan Turing.
Just a few years before, he'd helped
to turn the course of World War Two
by cracking Germany's
secret military codes.
Turing is one of the great original
thinkers of the 20th century.
He had thoughts that
nobody else was having.
Ten years earlier, he'd laid down
the foundations for the computer.
There's often a seed
that everything came from.
Alan Turing basically came up with
everything that computers do today.
During his lifetime, Turing's
achievements went unrecognised.
Instead he was disgraced.
But I can't get it outside myself to do it.
We all have decisions to make.
What are you saying?
I wish they'd leave me alone.
This film tells the story of Alan Turing
and how his ideas changed our world.
You may have something there, doctor.
The psychiatrist Alan Turing sought
help from was Doctor Franz Greenbaum
a German Jew who had fled to Britain
just before World War Two.
Presumably you'd like me to stop as well
but I can tell you now,
there's little point in trying.
Like you to stop what?
Pursuing... male...
Male?
Companionship.
We're not here for me,
you're here for you.
It doesn't matter to me what you do
as long as you're not in conflict over it.
Our father Franz Greenbaum
was treating Alan in the early 1950s.
He turned up in the most extraordinary
clothes when he came.
He looked as though he'd
been out of a rag bag.
I don't think our Dad was
in any way prejudiced...
towards homosexuality.
- Oh, I'm sure he wasn't. No.
At that time, in England,
that was considered quite way out.
So, how do we do this?
We talk.
What do I have to say?
You don't have to say anything.
But you should feel free
to say whatever you like.
There are some things I can't say,
things you can't know, about the war...
Things you can't even think.
There are some things about which
I'm under an obligation
a legal obligation, to remain discreet.
Well, there may be things
that you feel you can't discuss
but direct conversation is not the only way
that material gets conveyed.
How else does material get conveyed?
Through dreams, for instance.
Well then, I certainly won't be
telling you my dreams.
I am his nephew. That means that my father,
John, was Alan's older brother.
John and Alan were sons of the Empire.
Their father, my grandfather,
was in the Indian civil service.
When my father was four years old
and my grandmother is pregnant with Alan
they're sent back to England
and are left with a foster family
and they don't see their parents again
until my grandfather has
his next bout of long leave
which is going to be in several years' time.
I mean, I suspect that some of the
eccentricities or perhaps being withdrawn
or being able to disappear into his own world
could be attributed to some of that.
We're in the archive of Sherborne School
and this is a photograph from 1926.
Alan Turing, who was then 14,
is on the far left on the bottom row
looking at the camera very intently
with great concentration.
You almost wonder if he was thinking
about the camera and how it operated.
These are reports on his mathematics.
'He has considerable
powers of reasoning
and should do well if he can quicken up
a little and improve his style.'
His teachers didn't recognise they had
a tremendous mathematical genius in their midst.
This is the log book of the
Sherborne School library.
We see that he checked out Alice In Wonder/and
and Through the Looking-Glass
on 11th of April 1930.
Interestingly, there are three
books he took out that day.
Alice In Wonderland, Through the
Looking-Glass and The Game of Logic.
There's this wonderful picture
that his mother drew
called Hockey or Watching the Daisies grow.
And there is Alan with his hockey stick
ignoring the game, bending over
and studying the daisies.
I think he's a bit of a loner. I think
there's evidence of that from early on.
Turing was not someone who thrived
in social situations with lots of other people.
He was very athletic
but his sport of choice was running
which is of course a very solitary sport.
He had one very great friend
who was a boy named Christopher Morcom.
Morcom was, I think, more important to Turing
than any other human being in his life.
Turing was probably, in an adolescent way,
quite in love with him.
I think, in a way,
it was a kind of hero worship.
I think he did idolise him.
I think he worshipped him.
There was someone I knew at school
someone who didn't
at all approve of dirty talk.
Once or twice I tried to shock him
but it didn't work out.
What do you mean, it didn't work out?
He didn't take the bait.
He was just... above it.
He made me want to be good.
He was in a different house.
And boys in different houses
weren't meant to fraternise.
So I could only see him on Wednesdays
when we both happened to be in the library.
He would make fun of me
for my sloppy handwriting
for mistakes I made...
the careless errors.
He made me want
to improve my standards.
He was an example.
He was a friend.
I didn't care about his example.
What did you care about?
I cared about what I was in his eyes.
More so, in a sense,
than what I was in my own.
Morcom's influence on Turing
was absolutely enormous.
His importance was very,
very profound and very deep
both intellectually and emotionally.
Christopher was a great scientist with
tremendous gifts and tremendous curiosity
curiosity to match Turing's.
So they would often stargaze together.
They were both very
interested in astronomy.
They were more than just pals.
There was a great intimacy between them
but a very innocent... it was
entirely innocent of sexuality.
I think if you find a person like that
and I don't think
everybody does find one
in fact I think it's terribly rare
then all you thought before
all your plans for yourself,
you realise they were just filling a gap.
It was just something for you to do
while you were waiting for this person
and everything you want to be
is something for him, not yourself.
There is a drawback, however.
Finding such a person makes
everybody else appear so ordinary
and if anything happens to him
you've got nothing left
but to return to the ordinary world
and a kind of isolation
that never existed before.
At the beginning of December 1929
Chris and Alan went together up to Cambridge
for the scholarship examinations.
And at that time, they were both hoping that
they would succeed and obtain scholarships
and go on to study together at Cambridge.
It wasn't known, of course,
it couldn't be known
to Alan or to Chris
that shortly afterwards,
Alan was to lose his best friend.
Chris died on the 13th of February 1930.
One friend put it quite accurately
when they said, 'poor old Turing
was absolutely bowled over'.
Chris had contracted
tuberculosis as a child.
He suffered from poor health
all his life but he never complained.
He was very private that way.
When I heard he was dead
the world threatened
suddenly to be so different.
I found ways of dragging him around
with me to ease the transition.
I wrote to his mother
a number of times.
I made no secret of
the power of my feelings.
I told her I absolutely worshipped
the ground on which he walked
and she, being his mother,
found no reason to quibble with this.
We shared in the loss of him.
I asked her for a snapshot
and she gave me one.
I have it here.
See?
This is a letter from Alan to
my grandmother, Chris's mother
dated the 20th of February 1930.
He said, 'During the last year
I worked with him continually
and I'm sure that I could not have found
anywhere another companion so brilliant
and yet so charming and unconceited.
[Turing's voice] '/ regarded my interest in
my Work as something to be shared With him
and I think he felt a little
the same about me.
I know that I must put as much energy
into my Work as if he were alive
because that is what
he would like me to do.
Yours sincerely, Alan Turing.'
My mother was very
worried at the time
because I insisted that
Morcom was still with me
working with me, helping me.
He was my companion
and in some ways he was an even
steadier companion after his death.
I didn't want to frighten anyone,
but I knew he was still there.
After Chris's death,
Alan was determined to go to Cambridge
and in fact Alan did end up
with a scholarship to King's College.
Turing felt that there was unfinished work
which Chris had started
and which he wanted to continue.
It was while he was at Cambridge that
he wrote what would prove to be
I think, one of the...
seminal papers in mathematics
of the 20th century.
I don't think anyone, Turing included
was remotely aware of the significance
that this paper was going to have.
It introduces the idea of the computer.
Well, in my mind,
the reason Alan Turing is
well, one of the greatest
scientists of the 20th century
is this paper.
All our modern computers,
from laptops to video games
are exactly what he
laid out in this paper.
When Turing did his early work on computers
the word 'computer' didn't mean
a machine, as it does now.
It meant a person.
It meant a person who calculates,
who computes.
Hundreds and hundreds of young women
with mechanical calculating machines in a room.
And they would do little bits of calculation
and write the answers down on cards
and pass them along
to the next person in line.
And so Turing is clearly starting to think
'can we automate the whole thing?'
And the answer he comes up with is 'yes!'
He was working on a mathematics problem.
Almost incidentally to
a solution of that problem
he did a construction that
he called the universal machine.
And what that construction did
was just change the way people
thought about computation
in a very fundamental way.
Turing's Universal Machine
was purely hypothetical
but it laid out the fundamental principle
underpinning all computers -
that any conceivable mathematical calculation
can be done by a single device
shuffling ones and zeros back and forth.
This is a model of his theoretical machine
from this maths problem.
And the way this works is, he said,
you'll have some kind of processing head
which is basically what
the machine actually is.
It would be looking at a tape.
And so we've got here
a tape with symbols on it.
And the machine would have instructions.
So as it reads different symbols,
it can move the tape forward
it can wind it back.
And it could generally process
the information on the tape
And part of Alan Turing's
genius was to realise
that a machine like this can
compute absolutely anything
because anything can be
written as ones and zeros.
And this is the basis of all computers.
And the introduction of the universal machine
made up of apparently
absurdly simple components
a strip of paper, a pencil
a wheel to move the paper left and right
a set of very simple instructions.
These apparently trivial devices turn out
to have the most profound implications.
I've got here a generic smart phone.
And if you crack this open,
inside it in the centre here is the processor.
So this chip here does exactly what
Alan Turing described this machine doing.
And on the back of this I have
the memory, which is the tape.
And again it's exactly
what Alan Turing described.
A single machine that can be
programmed to do virtually anything.
In the coming years, it would be seen as
a moment of discovery, like Newton's apple.
The digital age had begun.
People credit Turing with
the invention of the computer
because he invented the concept
on which everything else was built.
[Archive footage narrator]
'In the electronics age
the development of giant computers,
electronic brains, has been a key development...'
He writes something that is so original
that you can't categorise it into any of the normal
mathematical categories that are around.
He started something genuinely new.
When you look back
at something like computers
there's often a seed that
everything came from.
Alan Turing was sort of at the top
of everything that ever developed
all the future research that was done
by people building real equipment
that can clink, clink, clink - compute!
One day ladies will be walking their
computers in the park and saying
'do you know, my little computer said
a very funny thing to me this morning'.
We have universal Turing machines
in hardware in our homes
and we use them for dozens
and dozens of different tasks.
Very few parts of our modern life
aren't impacted by Turing's ideas.
The things that he contributed
to computer science
weren't the things that just happened
to be true in one particular year
or in one particular decade.
They're the things that
are fundamentally true.
So they're always goings to be with us
in the same way that the things Galileo
and Newton contributed to physics
are always going to be with us.
All our modern computing
grew from this one idea of Alan Turing's.
Incredible.
But that would be the future.
Back in 1939, Turing's brilliant visions
were interrupted by the shock of war.
In 1939, with the advent
of the Second World War
Turing was recruited to be part of a team
who were involved in the effort
to break German codes.
The centre of operations for this
code-breaking effort was Bletchley Park
which was a country estate,
equidistant from Cambridge and Oxford.
And also very easily accessible from London.
It was a completely secret effort.
There's never been a place
where secrets were better kept
than they were kept at Bletchley.
We were on our honour not
to talk about this and we didn't.
My parents never knew what I did
until the day they died.
It was an extremely eccentric
bunch of people who were recruited.
There were mathematicians.
There was a British chess champion.
There were people who had won contests
to do crossword puzzles in a very, very fast time.
Turing was, in some ways,
the main architect of the code-breaking effort.
You needed exceptional talent
you needed genius at Bletchley,
and Turing was the genius.
I regarded him with a certain amount of awe
because he was 'The Prof'.
He was just regarded as very clever.
The Germans were coding their messages
using what was called an Enigma machine.
What you have here is a
German Enigma machine
developed in
World War II
to encipher messages between
parts of the German forces.
The whole point about the Enigma machine
is it could be configured
in a large number of ways -
15 million, million ways.
The German operator set the machine up
keyed the message in which scrambled it
transmitted the scrambled text.
The other intended recipient had a machine
set to exactly the same settings
and that descrambled the message
and revealed the plain text.
The Germans believed that this machine
was completely unbreakable.
Turing sat down with an Enigma machine,
and he looked at it
and he thought I can break that.
I had a dream.
Oh, good.
I didn't write it down though.
You should write them down.
What did you dream about?
I dreamt about Joan Clarke.
We worked together. I can't say.
Of course.
But, we were...
It was...
There was a war on.
I 'loved' her.
Or rather - I didn't not love her.
Joan Clarke was a rarity at Bletchley.
She was a woman who did the same work
and had the same status as male codebreakers
but she was probably paid less.
She was a mathematician.
It was known that
she and Turing had been close.
Joan and I, we...
we went to the pictures.
One didn't have to speak differently to her.
One could be amusing, have a laugh.
One didn't have to pretend.
Anyway, I thought that
if she was so sporting
one might just as easily
imagine her as a wife.
So I proposed marriage
and she immediately said 'yes'.
And just to be as sporting with her
as she was with me
I told her straight away that I fancied men.
And... this didn't bother her a jot.
At least she gave no outward sign.
It was a surprise to me when he said,
I think his words probably were
'Would you consider marrying me?'
He told me that he had
this homosexual tendency
and naturally that worried me a bit
because I did know that was something
that was almost certainly permanent
but...
we carried on.
Turing was doing something that was
fairly common at that time
which was, he was
going to make an effort.
He was going to make a
sort of stab at heterosexuality.
What was interesting was that he never
even reached the phase of marrying her.
He realised very quickly
that it was not going to work.
Did you never tell her that
you acted on your desires?
No.
Joan and I, we were interested in
how mathematics expresses itself in nature.
I thought our wonderful conversations
would be enough for both of us.
But a moment came
when you realised you would never
be able to be as honest with her
as she was with you?
Yes.
So I called it off.
I knew it would hurt her.
But it would hurt her
less than years of deceit?
Yes.
Turing was such, in some ways,
such an honest person.
Most would've married and either
led a sort of secret life with other men
or eventually divorced their wives.
And what this suggests to me was a much
higher degree of self-awareness
than a lot of other men
of his generation had.
I learnt nothing about
his homosexuality at Bletchley.
Turing was a very eccentric person.
He would wear a gas mask as he
went into work on his bicycle
because he suffered from hay fever.
He often went into work
with his pyjamas under his jacket.
This is the most eccentric thing of all:
he couldn't trust the banks.
He therefore decided
he would buy silver ingots.
And he would plant them in the park.
But he forgot where he had planted them.
And they have never been found since.
For Turing, wartime Bletchley
was a paradise.
It didn't matter if you were different.
All that counted was
outwitting the Germans.
The greatest threat to Britain's survival
was the war in the Atlantic.
Convoys were being attacked
by German naval U-boats.
It mattered because we
depended on sea transport
to get an enormous amount of supplies
into the United Kingdom for the war.
Defeating of the U-boats was the most
important task we had to perform
and without it we wouldn't have been
able to win the war at all.
We knew how important it was
and we knew also that
when we were not breaking
what the consequences were.
We had somehow or other
to break the U-boat codes.
Turing considered that the major way
of attacking Enigma cyphers was with cribs.
That is known plain text, in modern speak.
And this is where you could
guess the German text
which the operator
had keyed into the machine
in order to get the cypher text,
which you have actually intercepted.
A crib might be something so simple
as a word that would often occur
such as the word 'weather'.
The Germans always reported
to each other on the weather.
So the word 'wetter' - W-E-T-T-E-R,
became a very useful crib.
Time was of the essence.
And the conceptual breakthrough
that Turing came up with
was: well, if a machine is being used
to code these messages
we need to build a machine
to break the code.
The machine, designed by Turing
and a colleague, Gordon Welchman
was called The Bombe.
There were over 200 of these machines
working 24 hours a day, 7 days a week
looking for the settings on the
rotors of the Enigma machine.
What the Bombe did
was to explore the relationships
between the cipher text and the crib
looking for the Enigma configuration.
It would've taken people with pencil
and paper weeks to do that by hand.
And the Bombe could do it
in a few minutes.
Within a couple of years they were able
to read virtually all the Enigma traffic
except for the traffic that
was pertaining to the Navy.
The reason it was so difficult to crack
was because the Enigma machine
used by the German Navy
had even more permutations
that it put the letters through.
Nobody had actually managed
to break the naval Enigma system
and understand this extra level of complexity.
And that was what Turing did.
He realised that you could
actually use mathematics.
That if you applied maths
to the codes and the ciphers
then you could reduce the space
that had to be searched.
You could then use the Bombe
to search those reduced spaces.
He just took a large number of
messages which were intercepted
and he sat down and played around
with these, pencil and paper
and he worked it out.
Suddenly, we could begin
to break the messages
from the German high command
to U-boats in the North Atlantic
and that was absolutely vital.
We certainly couldn't have gone ahead
with D-Day when we did
if we hadn't cracked naval Enigma.
This ability to crack the code and thereby
read the German military traffic
helped the allies strategically so much.
Alan Turing's contribution
cannot be overstated.
I think that Turing's own personal contribution
towards winning the war was crucial.
At the end of the war
we all left Bletchley without
being allowed, as it were
to say anything about
what we'd been doing
which I think was a very great mistake.
I think we could've said more.
Turing's contribution was virtually
unknown during his lifetime.
And in fact, it took quite a few years after
his death before it eventually emerged.
Somehow the step of recognising and
acknowledging and thanking him was skipped.
He was treated abysmally
by his own government.
By the time the war had ended,
a new age had already begun.
The computer age.
And Alan Turing was at the heart of it.
In 1945, he designed one of
the world 's first computers.
The theoretical ideas he'd laid out
in his 1936 paper had become reality.
[Archive footage narrator]
'Manchester University
where anyone who
urgently wishes to know
Whether 2 to power of 127 minus 1
is a prime number or not
can be given the answer
by an electronic brain in 25 minutes
instead of by a human brain in 6 months...'
in 1948, Turing joined the mathematics
department at Manchester University
to work in a new computer lab.
Computers had only just been invented.
The prototype computer
was built here in Manchester
and it ran its first program in June 1948.
It was early years in the era
of using computers.
[Archive footage narrator] 'The brain at
present is only in the experimental stage.
The answer being read
from a cathode ray tube.'
Though by our standards
these computers are primitive
they sparked an extraordinary
idea in Turing's mind.
After a while, he started to wonder,
could a computer ever be truly intelligent?
Can machines really think?
Even the scientists argue that one.
He's obviously realised the
potential power of these machines.
He can see where they're going and
he's tackling a basic philosophical question.
Can a machine think?
Why can't something
of a person remain alive?
I'm not mad.
I don't believe an individual consciousness
could be transplanted into a machine now
though given a few years, who knows?
But for now I only ask
can we not house something like a human
consciousness inside an inorganic vessel
something permanent,
so it will remain and learn
and achieve something like wisdom,
a wisdom to which you and I can refer?
Would it ease your grief
over Christopher Morcom?
The creation of this machine of yours.
No, no, yes, but not in the way you think.
Not because I myself could vindicate Chris's
mortality by creating another intelligence.
It wouldn't be Chris after all, so how
could it possibly provide any relief?
No.
But because it would show Chris
his living hadn't been in vain.
That he would have inspired me
to create something
an intelligence, not his,
but in his name.
Something that would never die.
There's no question
but that Alan Turing
was the real father of AI
of Artificial Intelligence.
He was already making the argument that
there could be such a thing as a thinking machine
an intelligent machine.
Towards the end of 1950, Alan Turing
published a remarkable essay.
And in this essay, Alan Turing
argued that it was possible
to work out whether
machines possess intelligence.
Turing's basic idea is that if you're
trying to decide whether something is intelligent
it doesn't matter what's going on inside,
all that matters is the output.
His idea was that computers,
if they can pretend to be intelligent
then we may as well
consider them intelligent.
He realises there's a whole world of
philosophical debates and arguments
about what is and isn't consciousness.
Frankly, he said
if computer can convince you
it's acting intelligently, who's to say it's not?
Turing proposed something
he called the Imitation Game.
He imagines a machine
and a human and a judge.
If a machine can convince
the judge that it's a human
the machine should be
judged to be intelligent.
That's the Turing Test.
Turing is one of the great
original thinkers of the 20th century.
He seemed to be able to see further.
You get a feeling when you read his work
that his mind is way out in front.
Until now Turing's work had been secret,
or comprehensible only to mathematicians.
But his ideas on artificial intelligence
caught the public imagination.
He was now being quoted
in the national press.
[Turing's voice]
' This is only a fore taste of what is to come
and only the shadow of what is to be
but I do not see why it should not
enter any one of the fields
normally covered by the human intellect
and eventually compete on equal terms.
I do not think you can even
draw the line at sonnets
though the comparison
is perhaps a little bit unfair
because a sonnet written by a machine
would be better appreciated by another machine.
Turing was attempting to
demystify the idea
that human beings have a sort of
exclusive ability to experience emotion
to experience pleasure,
to experience pain.
Very, very controversial thing to say
because it was in effect taking mankind off
the pedestal that mankind had put itself on.
The idea that robots and computers
challenge us with
is their ability to imitate what we do
and therefore it becomes more and more
difficult to tell the difference.
What Turing's argument did was
to give computer designers ambition
and everyone else a sense of the scope
and scale of what might well happen.
Because, what he understood from his
wartime work and his work in the later 1940s
was that it would be possible to make
systems of machines of unimaginable scale.
They would develop,
they would have experience
they would have careers and in a
very interesting way they would have lives.
And that mixture of ambition and clarity, I think,
is one of Turing's greatest legacies to modernity.
Turing's ideas on artificial intelligence
established him as a visionary scientist
but there was more to his life.
By the 1950s, Alan was in one sense
an ivory tower intellectual
but in another sense he, you know,
he lived, occasionally at least, on the streets.
In many parts of Manchester,
there were cruising areas for gay men
where people could meet other men
from all classes and situations.
For someone like Alan,
entering the gay scene, the queer world
must have been intensely thrilling.
Surrounding all this of course
was the threat of the law
because male homosexuality
was totally illegal
whether in public or in private.
Turing, at a certain point in Manchester,
met a young man named Arnold Murray.
Meeting Murray started this chain of
misfortunes that eventually led to his arrest.
So what happened?
I met a young man - Arnold Murray -
in Manchester. On the Oxford Road.
He looked hungry,
so I bought him a meal.
I gave him my address and later
he came to my home to see me.
He spent the night.
He was 19.
He didn't have a privileged upbringing
but he has aspirations.
I know in a sense he brought me down
but I feel sorry because
I brought him down as well.
I think Turing, like many other
men of his generation
would've felt they were living on the edge.
Not all the time
but were aware that one step into the wrong
direction could push them over the edge.
He would've been aware of the risk.
Perhaps he wasn't entirely surprised
when disaster struck.
I think he stole from me.
A few pounds,
but I couldn't be certain.
I accused him. He became angry.
I weakened.
He spent the night again.
This theme repeated itself
throughout our acquaintance.
And then one day I came home
and found I'd been burgled.
Alan invites this young man into his home.
And the result of this encounter
or series of encounters
is that my grandfather's pocket watch
which was given to Alan
as a very special gift, was stolen.
So I confronted Arnold.
I believed him when he said
he'd had nothing to do with it himself.
He'd been chatting
to a friend of his
Harry, who was a proper renter
not like Arnold,
who appreciated favours
but would absolutely accept no cash
unless it was dressed up as a loan.
Anyway, this Harry, he'd seen a letter
Arnold was posting to me.
He'd seen my address.
Arnold talked to him about me,
told him that I worked
on the electronic brain.
And this must have suggested privilege.
So Harry concocted this
burglary in Arnold's company
but Arnold did nothing
to warn me about it.
In his defence, when I confronted him,
he spilled everything.
Turing was such an honest person
and he was so much
the opposite of calculating
he was not Machiavellian in the least.
He'd been robbed.
When you're robbed you go to the police.
He was naive, in a lot of ways.
He had faith that the
system would protect him
and that turned out to be a
disastrous misstep on his part.
And of course the police then discover
that they'd hit the jackpot.
They'd discovered that he had
a young man in his house
and there couldn't be any sensible
reason for him being there
other than something
which was criminal, disgusting
and, you know, possibly a security risk.
The police didn't care about the robbery.
The police were much more interested
in arresting a professor
on charges of gross indecency.
So what did you say to the police?
I told them everything.
I told them I'd been having
an affair with Arnold Murray
and that he'd given my
address to a young man
who was known to burgle
men he'd met for sex.
And you told the police
that you had sex with Murray?
They asked me what we got up to.
I told them we engaged in mutual masturbation,
soixante-neuf, and inter-genital friction.
Soixante-neuf?
Sixty nine.
Yes I know what it means.
I was just wondering,
why you would say that to the police?
I told you. I revealed everything.
I was wondering
if you cloaked it in elitist language
to keep the police in their place.
They're unlikely to speak French,
aren't they, the police.
To say that they may be the foot soldiers
that are out there to enforce the law
but you, who speak French,
are amongst the lawmakers
the politicians, the inventors,
the forgers of new paths.
I wanted my watch back,
my father's watch.
I wanted them to do their job.
But as soon as they knew
you were a sodomite
you gave up your right
to command them.
You became their prey.
I didn't go down for sodomy.
I'm sorry, I thought you
practised sodomy with Murray?
For God's sake, would you stop saying
'practised sodomy' as if it were the bloody piano.
And the charge was not buggery
it was 'Gross indecency contrary to Section 11
of the Criminal Law Amendment Act of 1885'.
It was the same law
that convicted Oscar Wilde.
It's good to know things are moving forwards.
You're right, by the way.
As soon as they learned I was a homosexual
the burglary more or less vanished.
One of them actually said to me
'if you consort with naughty people,
naughty things are bound to happen'.
As if by having sex with another man
it was fit and proper that burglary
should follow close on its heels.
[Turing's voice]
Dear Norman
I've now got myself into the kind of trouble
that I have always considered
to be quite a possibility for me
though I have usually rated it
at about 10 to 1 against.
I shall shortly be pleading guilty to a
charge of sexual offenses with a young man.
The story of how it all came to be found out
is a long and fascinating one.
No doubt I shall emerge
from it all a different man
but quite who I've not found out.
Yours in distress, Alan.'
In March 1952, Alan Turing
was convicted of Gross indecency.
He'd become well enough known
for it to be a public disgrace.
What the court ordered was effectively
to have Turing chemically castrated.
That was to effectively remove his body
of the male hormone testosterone.
He's given a choice. He could go to jail
or he could agree to this treatment.
He chose the so-called organo therapy
which amounted to chemical castration.
Turing was probably given a drug
that we now know as stilboestrol.
That is a synthetic version of the
female sex hormone, oestrogen.
He had to attend the
Manchester Royal Infirmary
on a monthly basis
for the first 9 months.
He had to take daily tablets
and then for the final 3 months
an implant was put into his thigh.
'Chemical castration' they call it.
Very civilised.
I take it every day and once a month
I get tested at the hospital
to make sure I don't have any of that
naughty testosterone in my blood.
It's meant to cure me of my desires.
The kinds of the things that Alan Turing
would have experienced
would have been an
immediate change in his libido
his inability to get an erection.
He would have become impotent.
His testicles would have shrunken in size.
He would've stopped shaving.
Over time, he would've grown breasts.
And that would have been the distinctive signature
of somebody who was chemically castrated.
He was told the effects
of the treatment were reversible
and no doubt that was part
of the reason he agreed to it.
The arrest was, I think,
a turning point in his life
because it was at that moment
that for the first time
he understood how untrustworthy
British society was
and the he was very, very expendable.
I think it was a demoralising experience
and embittering experience for him.
And he was never the same afterwards.
I mean what's going on, partly, in the
insupportable tragedy of Turing's fate
is what happens when
deeply institutionalised English intellectuals
encounter what life's like
outside the walls.
They forget and cannot imagine
how evil and vicious life can be.
Spring, 1953.
Alan Turing had been visiting
Dr Greenbaum for six months.
For some mad reason the number of petals
on most flowers is a Fibonacci number.
Each number the sum
of the previous two, yes?
1,1, 2, 3, 5, 8,13, 21, 34...
So...
Our father was very interested
with everything that Turing was doing.
I think he recognised a genius.
And in talking and sharing ideas,
it must have been fascinating for him.
Cells don't have a mind of their own.
But a clump of cells will split
and eventually some of the cells
will become the backbone of a bird
and some of the others
will become its wings.
But how do the individual cells know
what part of the organism to become?
So I asked myself whether there might be
some mathematical underpinning
to patterns that occur in nature...
like the spots on a cow
or the petals on this daisy.
Turing had been working on
a revolutionary idea
that mathematics can in principle describe
a process called morphogenesis
the way shapes and patterns emerge
in living organisms as they develop.
After the war, Turing got interested in biology.
He got interested in plants,
and the patterns in plants.
He was also interested in markings on animals.
Why are tigers striped,
leopards have spots?
And the idea that there could be
a mathematical theory of stripes and spots
was something that biologists
just hadn't really thought about.
And for that matter,
neither had the mathematicians.
People did not put
those two things together.
So Turing was right out on the forefront
of mathematical biology
that's now become very important.
What he did, he came up with
a mathematical equation
that described how the patterns formed.
If you look at tropical fish you'll see that
there are spots, there are stripes...
How does that actually come about?
And Alan Turing, in the early 1950s,
really began to attack this problem.
And the way in which he approached this
was from a very pure mathematical point of view.
This equation shows that chemicals
following incredibly simple mathematical rules
can, in principle, spontaneously create
the markings on living creatures.
It's such an interesting equation
because it looks very simple...
it doesn't sort of scream
stripes or spots at you.
But as soon as you
start thinking about it
certainly when Turing
started thinking about it
he had had this big insight
that patterns are going to form.
The rules are not just put black here,
put white there
put black here, put white there
they are not paint zebra by numbers rules.
There are just a naturally running
mathematical system
which by some beautiful feature
of the mathematics
you crank the handle on the mathematics
and out comes the stripes or the spots.
One of the first areas
in which he applied this
was to explain the black
and white dappling on cows
and he published a famous paper
his morphogenesis paper, explaining that.
You can even draw some sort of parallel
between what Turing did for nature
and what he did in Bletchley Park.
Turing is decoding nature.
He had an almost physical feeling for how
those equations moved and played together.
And probably the closest analogy for me
is of a composer.
Turing is a little bit like Mozart.
He could hear the whole glorious structure
of it somewhere inside his head.
Turing really set the scene for a lot
of science that is now going on
50 or 60 years after he started this work.
I don't expect you to read my paper
as fascinated as you appear to be
in the activities of my imagination.
To me, morphogenesis is a giant
beautiful mathematical dream
but to you - I think it would just appear
a series of scary mathematical functions.
In a funny way, he had returned
to where he started intellectually.
When he was a boy at Sherborne,
he was very interested in botany and biology.
There's of course that famous image of him
during the hockey game -
watching the daisies grow.
Turing effectively came full circle
and returned to that period in his youth.
As their sessions continued,
Greenbaum saw Turing not just as a patient
but also as a friend.
I think the empathy that he developed
with Alan Turing was very much that.
It was a friendship thing that
developed out of the medical relationship.
He was part of the family.
He was very friendly towards me.
And Alan would come
and sit by me and talk to me
and take an interest in what I was doing.
I just liked him as a person.
As a child, I would sit there
on the floor playing the solitaire game.
And he would sit there chatting.
And then out of the blue
this letter arrived in the post.
It says, 'Dear Maria. It is just to tell you
how to do the solitaire puzzle.'
And there he's drawn a little diagram.
And then he goes on to close the letter
'I hope you all have a very nice
holiday in Italian Switzerland.
I shall not be very far away
at Club Mediterrane,
Ipsos, Corfu, Greece.
Yours, Alan Turing.'
During this period, Turing made
a couple of trips to the continent.
British gay men often went abroad because
they were able to live more freely abroad.
There was not this constant
looming threat of arrest.
He sent us a card from Greece.
'I've met the most lovely
young man on the beach', he says.
The continent offered joys, pleasures,
especially after the war.
And Greece had this mythological status.
And by the 1950s, Paris, parts of Scandinavia,
offered these golden opportunities.
During this period, he decided to make
a trip to Bergen, Norway for a holiday.
He caught the ferry here in Newcastle
and it was a ferry ride
right out there across the North Sea.
Norway represented for him
an alternative to the much more rigid,
repressive atmosphere of England at the time.
I've been learning Norwegian.
I rather like Norway.
It may become a routine.
They have dances there for men only.
Men dancing with men. Imagine!
While he was in Bergen,
he met a young Norwegian man named Kjell
with whom, as he described it,
he shared a drunken kiss under a flag post.
This episode, which seemed very innocent
was unfortunately to have very,
very serious repercussions for him.
There was a boy from Norway
who apparently came to visit me
but something happened involving
the police and I never got to see him.
His name was Kjell.
He wrote to me to say
he was coming to visit.
And, as I understand it, he arrived
but before he could make contact
it appears he was chased by the police
all over the north of bloody England
and finally he went home.
He was quiet.
Handsome.
A winning combination!
I know they've been watching my house.
Perhaps that's what spooked him.
I wish they'd leave me alone.
An important question is
why the police were following Turing.
I suspect the reason was because
he was perceived as a major security risk.
We have to remember that 1952 was
the absolute height of Cold War paranoia
during which the idea of the homosexual traitor
was taking hold in the popular imagination.
Homosexuals must not
be handling top secret material.
The pervert is easy prey
to the blackmailer.
Turing fit the part perfectly.
We know that he had a lot
of classified, secret information
that he had gathered during
his time at Bletchley Park.
I think there was probably an assumption
that Turing might very well go rogue.
And so the police really began
to close in on him.
And this, I think,
is something very, very tragic.
I think he began to feel increasingly
that he had no freedom anymore
that he couldn't have
any kind of an ordinary life.
It's worth bearing in mind that at the same time
he was undergoing the organo therapy
which was playing havoc with his hormones.
It wasn't just Turing's body
that had been damaged.
His brain too had been affected.
We know from the medical evidence
that if you castrate a man
then you change his ability
to think and his ability to concentrate.
And if you take testosterone away,
then the brain will become muddled.
[Turing's voice] I've got a shocking tendency
at present to fritter my time away
in anything but what I ought to be doing.
I thought I'd found the reason for all this,
but that hasn't made things much better.
In April 1953, his oestrogen treatment ends.
Turing was perhaps expecting
things to change quickly
but his body was not responding in the way
that he may have thought it would have done.
The theory is if you stop exposure
of the male body to oestrogen
then slowly over time his testosterone
levels will begin to rise.
That's fine, in theory.
It can take many, many months, six, seven, eight,
nine months, to recover sexual function, if at all.
Some men report that they never
recover their sexual function
after they've taken
oestrogen therapy for that long.
Organo therapy was court-ordered at my trial
if I wanted to avoid prison.
They're hormones, female hormones.
They're meant to decrease my libido.
And they do... have.
But being hormones,
they also cause other physical reactions.
They say the effects are reversible.
Well, it ends there.
The thought ends there.
I don't know why I should have
gone to such lengths to avoid prison.
Being locked up with a bunch of ruffians?
I can imagine myself paying for that.
Should we go inside?
The condition of his life was becoming
increasingly untenable, increasingly grim.
Somewhere along the line,
something broke.
His ability to endure failed
and the suffering that he was undergoing
became, I suspect, overwhelming.
In May 1954, Alan Turing joined Franz Greenbaum
and his family on a day trip to Blackpool
a beach town in Northwest England.
Alan was wearing a stripy blazer
with the sleeves up here
on the white shirt
poking out from underneath.
So he really looked very strange.
There was a fortune teller's tent
on the promenade
and Alan decided that he would like
to go in and see the fortune teller.
And he went in there
and he was gone for a little while
and he came out and we looked at him
and he was ashen-faced
absolutely horrified expression on his face.
Do you know what's here?
What?
Signals. Radio signals. Just here.
The air is full of radio signals
flying past our heads
ready to be intercepted.
We all see different things.
Do you know honeybees
see by ultraviolet light?
Their eyes perceive a range of wavelengths
entirely different to what we can see as humans
and so, even though we're in the same world,
we see another world entirely.
When I went to see that
fortune teller in Blackpool
she told me one or two things
I suppose I didn't want to know.
What did she say?
Our session was private,
just like yours and mine.
But she saw things other people don't.
Rather like you.
He wouldn't divulge what had happened,
what the woman had said to him.
He was desperately, desperately unhappy.
And he didn't say anything more after that.
I don't think I'm allowed to travel anymore.
It doesn't matter what I say now, does it.
They think our sort are weak-willed
and so we're bound to talk
so fuck them, fuck them sideways.
I'll say whatever I please.
Alan, what's happened?
Nothing.
Nothing's happened.
Nothing new anyway, nothing different.
There must have come a moment
when he felt it just wasn't worth it.
That sense of despair.
Whatever the possibilities of his life, for him,
those possibilities didn't seem realistic anymore.
I've seen Snow White and
the Seven Dwarfs seven times.
That's 49 times I've seen a dwarf.
Do you ever wonder what poison
she soaks the apple in?
They don't say in the film.
She'd have had her pick.
Poisons appear everywhere in nature.
Some of the most beautiful flowers
contain the deadliest poisons.
Oleander, Rhododendron, Narcissus.
Do you know what their poison did to me?
It shrunk my testicles.
I grew breasts.
I, we all, worked to break Hitler
because what did he do?
Amongst other things?
He sterilised Jews. Jews like you.
We fought that bastard.
We defeated him.
And when we were finished,
what did they do to me?
And I'm supposed to allow it.
It would be despicable
to do that to anyone
but to do that to someone who ought to
have been treated as a national hero
seems to me especially despicable.
What he suffered was too profound
and too debilitating for him to recover from.
He suddenly saw what a
nasty place the world was.
There are things I can do.
We're all at war
all of us, all of the time,
each in our own little fucking war.
What are you saying?
Don't worry. I'm not saying anything.
Although Snow White,
coupled with my own perverse thinking
did yield an amusing idea
as to how someone might kill himself
using an apple and electrical wiring.
That would be illegal.
Well, if a man were successful
the bastards would have to try
to pull him back from the mouth of hell
and I have to say -
though I'm not telling you this
it would almost be worth it
just to see them try.
We all have decisions to make.
I don't know what it was
that finally tipped him over the edge.
But I think you've got a mixture there
that is just at boiling point
and it won't take a lot more
to make it boil right over.
Mathematicians talk about
the beauty of numbers
but I know - because I was one -
they're talking about the computable
the beauty of what can be resolved.
But what about the rest,
the greater infinity?
What's not computable lies beyond
the infinitesimal sliver of knowledge
we've managed to subdue inside
our fragile, trembling human consciousness
a consciousness which is, in fact, decaying
within us from the moment we're born.
I won't be able to come
for dinner on Sunday.
I'm afraid I've made other plans.
Alan, come back! Sit down!
Alan Turing's body was found by his
housekeeper on June the 8th, 1954.
He was 41 years old.
The death was recorded as suicide,
caused by cyanide poisoning.
A half-eaten apple lay by his bedside.
He left no note.
My mum came in and she said,
'I've got something to tell you'.
And she said, 'Alan has died'.
And I was just so upset.
When we heard that he'd died,
our father was very upset.
It was very disturbing.
Terrible waste of a brilliant brain.
We lost one of our great computer scientists,
one of our great mathematicians
one of our first mathematical biologists
and I think British science
would have advanced faster
and would have been different
in many ways
more creative, in some ways,
if Turing had lived.
I think all we can say is that
it is a terrible tragedy
that such a great and brilliant man
should have had to suffer so much.
And that his life should have
ended in such a tragic way.
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