Are you sure this gas is going to work?

I don't have any Sontaran physiological data, but the anaesthetic would disable a human for two hours.

And a Sontaran?

We only need a few minutes. [They spot two lights in the air]

It's the Sontaran's drones. Run! [But they cannot outrun them]

Get down! [Clyde tackles Maria and Luke and knocks them both down as Sarah Jane sonics the drones]

Mum!

Quickly. Maria, you have to go with Clyde. He's going to try to disable the dish. Luke, you're with me. We have to try everything we can.

This is what drives the dish?

Lucy says there's a central control system transponder. All we've got to do is take it out.

Doesn't that sound a bit too easy?

The hard part's finding it.

Any luck with the programme?

It's no good. I can't do this.

Let me.

What? I mean, no disrespect or anything, but you're just a kid and we're looking at the end of the world here.

No disrespect, Lucy, but you really aren't much more than a kid, either, and can you see the flaw in Einstein's Theory of Relativity? Luke can. And he can save the world. He's had practice. Fifteen minutes to go. Why isn't Kaagh here to see his plan succeed?

It's got to be around here somewhere.

Fourteen minutes, Clyde. [Professor Skinner grabs Clyde] Let him go!

Go, Maria. Find the transponder. Now! [Maria runs] Get off me. Get off! [Maria spots a red switch box and opens it]