Posing as an official Examiner from Earth summoned to investigate a space capsule, the Doctor warns the scientist, Lesterson, of the dire consequences of reactivating the dormant Daleks.

The Doctor and Romana encounter a spaceship carrying sacrifices to the Minotaur-like Nimon. Tom Baker, Lalla Ward. Pilot: Bob Hornery. Teka: Janet Ellis.

The tracer brings the TARDIS to the planet Tara. Romana finds the fourth segment disguised as part of a statue but is then taken prisoner by Count Grendel of Gracht. Grendel is plotting to seize the Taran throne from the rightful heir, Prince Reynart, and has mistaken Romana for an android duplicate of the Prince's betrothed, Princess Strella, to whom she bears a remarkable resemblance.

The Doctor intervenes in the plans of a nefarious marshal who plans to wipe out the indigenous inhabitants of a colony planet.

The overlap between quantum reality and science fiction is discussed.

Witches cast a spell on the Doctor and Martha.

The Doctor takes Martha to the planet New Earth in the future where the streets are ruled by sinister pharmacists.

Part 2. The Doctor forms a deadly alliance to save humanity.

Part 1. The TARDIS lands in 1930s New York, where people are disappearing from the streets.

Turning back the clock has consequences.

As a spaceship hurtles towards the sun, the Doctor and Martha have just 42 minutes to save the day.

The Doctor and Rose board the Tardis and visit mankind's new home but they find gruesome secrets in a luxury hospital.

The Doctor and Rose travel back to 1879, but an encounter in the Scottish Highlands with Queen Victoria and a band of warrior monks reveals a deadly trap.

The Doctor investigates a haunted London school and runs into an old friend.

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.