Doctor Who/Recap/S16/E02 The Pirate Planet

Everything About Fiction You Never Wanted to Know.
< Doctor Who‎ | Recap‎ | S16

"What is it you're really up to, eh? What do you want? You don't want to take over the universe do you? No. You wouldn't know what to do with it beyond shout at it."
The Doctor

The search for the Key to Time takes the Doctor and Romana to Calufrax. The coordinates are right, but it's too warm and inviting a world to be Calufrax. In fact, the world is Zanak. But the Tracer is going berserk—it's sensing the segment everywhere.

It turns out the planet Zanak has been hollowed out and fitted with engines, and is now piloted by the demented Captain - all robotic parts and a nursemaid - who "jumps" it into position around other planets, sucks them dry and mounts the shrivelled husks in a trophy room.

The nursemaid turns out to be the real brains behind the operation, a holographic projection of Zanak's Queen Xanxia, using time dams and the forces generated by the trophy room to remain young. The Captain announced that Zanak's next target is Earth, and the Doctor enlists the help of the native Mentiads to sabotage the engines. The Captain rebels and is killed by Xanxia, who is in turn killed by one of the natives.

The Doctor realises that the segment of the Key to Time he is after is in fact the entire planet Calufrax, now conveniently shrunk to a rather more manageable size...