back.
- Come to stay this time?
Thank you.
I can't see anything to worry about back there.
Oh, thanks for checking anyway.
Where is our passenger?
You've sent her back, haven't you?
- She wanted to go.
- And you helped her.
Zukan need never know.
He saw her come aboard.
And as far as he's concerned, she still is.
When he gets back to Betafarl,
he'll think she's simply disappeared again.
- We know nothing about it.
- He'll never believe that.
But you lie so well.
We're going back.
If we do, Zukan will know for certain.
Almost there?
Another day. The programming will take longer.
Will it be ready to test-run
by the time Scorpio gets back?
I hope so.
- Has Avon arrived yet?
- By this evening.
Betafarl has perpetual day, did you know?
No.
It never sleeps.
Perpetual light.
All that energy.
There are times when I miss the darkness.
It's hard to live always in the light.
I shall leave this evening.
There's little more I can contribute here.
Well, won't you stay for the test run?
My people will. I have confidence enough in them.
Base to Scorpio. Scorpio, do you read?
Scorpio to base, we hear you, Dayna. Go ahead.
Zukan to depart base for Betafarl in three hours.
I say again, Zukan 32 hours behind you.
Do you understand?
Only too well.
Happy landings. Out.
He's going to get here and discover
that his daughter is nowhere to be found
before we've even finished loading.
Unless we get a move on.
If it comes to a choice between
the alliance and Zukan's revenge
don't think that I won't sacrifice you.
- Up to power.
- VILA: You're clear for lift-off, Zukan.
I salute you all.
Glad I won't be down there half an hour from now.
You're just in time.
Thank you.
When your father finds out, he'll probably
incinerate us all. Do you realise that?
ORAC: Someone would seem to have
anticipated him.
Orac?
Scans indicate a foreign object in the teleport bay.
My calculations suggest that
it is an explosive device.
- A bomb?
- Precisely.
I can't see anything. Where? Where, Orac?
It's at floor level on the right-hand side.
What's happening?
Channel one, dead. Two, dead.
Kill that alarm, somebody. Vila, switch it off!
We've got channel five.
Is that all?
It's all the entrances and exits.
- We've been boxed in.
- Yes, but...
Extent of damage, Orac?
Orac?
(Orac expiring)
SERVALAN: Is it well-met, Zukan?
Well-met it is, Commissioner.
This is Finn. Without him I couldn't have done it.
If you had only told me
the whereabouts of their base,
you needn't have done anything.
Are they dead?
Dying. Now.
We don't know how far it goes.
We're about 30 yards from the mouth
of the tunnel.
It can't go any further than that.
(Rubble tumbling)
It could take us anything up to four days
to dig that far.
At least we've got enough air.
The ventilation system's still functioning.
Well, that doesn't make sense either.
Why should someone block us in,
but leave us air to breathe?
DAYNA: Tarrant, get back here.
Why?
Look!
(Screaming)
ZEEONA: That was Jarder.
VILA: What the hell is doing that?
Whatever it is, it's coming towards us.
It's getting nearer all the time.
- What is it, Tarrant?
- I don't know.
VILA: What's causing it?
ZEEONA: I don't know.
- The explosions, something...
- The air.
It's in the air. That's why
the ventilation system's been left working.
Whatever it is, it's being carried in the air.
VILA: The air?
- Switch it off.
- DAYNA: What?
Everything off. All life-support systems off.
We've got to stop the air circulating.
Are we safe?
How do I know?
How much oxygen have we got down here?
How long can we last without fresh air?
Eighteen, twenty hours.
And how long to dig our way out?
- Anything up to four days.
- Oh, no.
Oh, well, I was never very good at maths, but...
You don't have to be.
We're dead.
You know the composition of the antitoxin.
You didn't leave without obtaining that.
That's why you wouldn't tell me
the location of their