The Doctor looks at Liz when she mentions a scanner and he points to his pocket. "Check my pockets." She won't find his sonic screwdriver in there but there's a 'scanner' that looks like it was put together with an erector set, string and a few sticks of gum. "Its not much bit it works."

He holds his finger up in the air and he ums. "I'm familiar with this type of thing." The Doctor doesn't go to point out that he's the 'alien' among humans. "Well we're all alien here. Mmmm, lets see where are we? If I had my TARDIS this would be a lot easier to figure out. My guess is we're somewhere in the Proxima system."

The Doctor shudders and there's the sound of the wolves getting closer, they're in sight as they come up at the edge of the forest. There's four of them and there's the sound of chattering coming up behind them.

They're a tall and ugly bunch of trolls that don't look too happy about intruders.