Bettan and Sevrin in “Genesis of the Daleks”

Bettan

Right, bring out the explosives. Now, lay the charges on each of these main carriers. [indicates the pillars supporting the ceiling] One charge for each beam should be enough. Are you quite sure this is the only way into the bunker?

Well, the only other way was from the Kaled dome, and your war rocket caved that it. It can never be cleared.

Bettan

If we do the same here, we'll entomb the Daleks and those who created them.

But Sarah and the Doctor are inside. You'll give them a chance to get clear, won't you?

Bettan

I must blow the roof as soon as the charges are laid. I can't delay. If the Daleks find out what we are doing and attack, I don't have enough men or arms to stand them off.

How long?

Bettan

Thirty minutes, perhaps less.

Then I must get inside and try and warn them.

Bettan

That's up to you. But you must understand. If you're not back, I must go on. You'll die in there with them.

[beat] I understand.

Bettan

I'll give you what time I can.

Right. [walks into the bunker]