 The one thing the Doctor always keeps near is the Tardis. So losing it in a black hole somewhere in deep space is a bit of a worry. Not least, he says, because without it he ll have to settle down and get a mortgage. In this two-parter (The Impossible Planet and next week s The Satan Pit), the Doctor and Rose land in a ramshackle spaceship stationed on an obscure planet that s trapped in permanent orbit round an all-consuming black hole. But that s only half the problem. An army of hideous-looking Oods stalks the corridors, while a disembodied voice repeats, "The beast is awakening."