:58:02
a sleep transmitter has
just gone active in East Anglia.
:58:05
Sent two messages.
:58:06
First, two weeks ago.
:58:08
But the second soon after
your glasgow incident.
:58:12
So he's already asked for
a replacement disc.
:58:17
And if you were still on the case how
would you track him down?
:58:23
Well, we know
he's at least one component short.
:58:26
I would start by working
on recent immigration records
:58:29
of all Soviet Block citizens.
:58:31
Try to pick out the courier.
:58:35
Alright I can get you those records.
:58:37
I'll have them brouth round
to your flat.
:58:41
Okay.
:58:43
Just keep Harcourt Smith off my back.
:58:45
Oh, he's much too busy working on
his Knighthood.
:58:50
Timmy!
:58:54
First of all,
there'd be a core of uranium.
:58:56
Probably round and about five inches
in diameter.
:58:58
Now there'd be a two inch diameter hole
right through the centre.
:59:03
Over here we have
a two inch diameter ord.
:59:07
Also uranium 235.
:59:10
Now when the rod is rammed into
the heart of the fissionable core
:59:14
the mass
:59:14
of the two together rises beyond
the critical threshold.
:59:18
And that's when things start
to get exciting.
:59:21
The fissionable core will explode only
if at the moment of criticality
:59:24
it's bombarded by a blizzard
of neutrons and the blizzard
:59:27
is created by the initiator. . .
:59:30
Lithium. . .
:59:31
And polonium. . .
:59:33
what is it that wends the plug down
the tube into the mass?
:59:37
any old plastic explosive.
I believe you know about that.
:59:42
so what we're looking for
is some plastic explosive
:59:45
a detonator tow small discs a tube. . .
:59:50
A round metal case and a rod of uranium
:59:54
And the uranium ball.
:59:56
The thing about uranium, it's heavy.
:59:58
Twice as heavy as lead.