Part 1. The Doctor finds an unusual hiding place.

Part 2. Smith and Jones are under siege.

When people start to disappear, a young woman finds cryptic messages bleeding through from a mysterious stranger called the Doctor.

Part 1. Harry Saxon becomes Prime Minister, but has dark ambitions.

Mars, 2059. Bowie Base one. Last recorded message: don't drink the water. don't even touch it. not one drop... Confused? All will be revealed in The Waters of Mars, starring Lindsay Duncan as the Doctor's cleverest and most strong-minded companion yet.

The Doctor and Adric learn from the wizened Keeper of Traken that a great evil has come to his planet in the form of a Melkur - a calcified statue. The Keeper is nearing the end of his reign and seeks the Doctor's help in preventing the evil from taking control of the bioelectronic Source that is the keystone of the Traken Union's civilisation.

The inhabitants of the planet Skonnos have been promised by an alien Nimon that he will restore their empire to greatness if they in return provide young sacrifices and radioactive hymetusite crystals, both of which they are obtaining from the nearby planet Aneth.

The Swampies decide that Kroll must be appeased with human sacrifice, and guess who they select as the victims.

Kroll embarks on a rampage and Thrawns efforts to defeat the monster only make things worse.

Kylie Minogue joins Doctor Who to play Astrid, a waitress on a doomed spaceship that eerily resembles the Titanic. When a meteor hits, Astrid and The Doctor must protect the survivors from and prevent the whole ship from crashing to Earth.