After the Doctor and his friends are exposed to a strange plague, Sarah becomes infected. Meanwhile, the Cybermen plan to destroy the planet of gold. Tom Baker, Elisabeth Sladen. Tyrum: Kevin Stoney.

Conclusion. Tom Baker. Romana: Mary Tamm. Shadow: William Squire. Marshal: John Woodvine. Princess Astra: Lalla Ward.

The TARDIS is hijacked with Dr. Who, Romana and Adric aboard. Tom Baker, Lalla Ward, Matthew Waterhouse. Biroc: David Weston. Packard: Kenneth Cope. Rorvik: Clifford Rose.

The TARDIS arrives on Fang Rock, a small island off the English coast, around the start of the 20th Century. The Doctor and Leela seek shelter at a lighthouse where the island's only inhabitants - Ben, Vince and Reuben - operate the recently-installed electric lamp to warn ships off the treacherous rocks.

The planet Karn is home both to a mystic Sisterhood, whose sacred flame produces an elixir of life, and to Mehendri Solon, a fanatical scientist who is using the remnants of spaceship crash victims to put together a new body for the still-living brain of the executed Time Lord criminal Morbius.

The Doctor and Leela (Louise Jameson) investigate a dark lighthouse on Fang Rock. First of two parts. Vince: John Abbott. Reuben: Colin Douglas. Ben: Ralph Watson.

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.

An anachronistic twelve-million-year-old human skull has been discovered by archaeologists and is now being used by Professor Fendelman in his time scanner experiments at Fetch Priory in contemporary England. The skull is actually an artifact of the Fendahl, an ancient creature that feeds on the life force of others.

The list of victims grows, but there is no trace of the killer. Tom Baker, Louise Jameson. Adelaide: Annette Woollett. Skinsale: Alan Rowe. Harker: Rio Fanning.

UNIT are sent to investigate the suspicious death of a Welsh miner whose body has developed a strange green glow, and Jo joins a group of anti-pollution protesters. Meanwhile, the Doctor pays a visit to Metebelis Three.

The Doctor, Romana and K9 are led by the tracer to the Nine Travellers, a circle of standing stones on Boscombe Moor in present-day England, but the third segment is nowhere to be found. They meet elderly archaeologist Professor Emilia Rumford and her assistant Vivien Fay, who are surveying the site, and learn that the circle appears to have had a variable number of stones over the years.

UNIT are sent to investigate the suspicious death of a Welsh miner whose body has developed a strange green glow, and Jo joins a group of anti-pollution protesters. Meanwhile, the Doctor pays a visit to Metebelis Three.

The Doctor and a newly-regenerated Romana arrive on Skaro and discover that the Daleks are using explosive charges and a group of humanoid slave workers to mine the planet in search of their creator, Davros. A stalemate has arisen in an interplanetary war that the Daleks are waging against the robotic Movellans, and their hope is that Davros will be able to give them the edge.

UNIT are sent to investigate the suspicious death of a Welsh miner whose body has developed a strange green glow, and Jo joins a group of anti-pollution protesters. Meanwhile, the Doctor pays a visit to Metebelis Three.

Two incarnations of the Time Lord (Colin Baker, Patrick Troughton) join to stop Dastari and Chessene from performing dangerous experiments in time. Dastari: Laurence Payne. Chessene: Jacqueline Pearce. Peri: Nicola Bryant. Jamie: Frazer Hines.

A man named Elton is plunged into a world of living nightmares when he becomes obsessed with the Doctor, Rose and their mysterious blue box.

The Doctor plans to show Rose the London Olympics in 2012; a mother hides her daughter's unearthly powers.

The human race rejoices as ghosts of loved ones return home; an invasion force threatens modern day Earth.

Two mighty armies wage war across the Earth; terror emerges from beneath Torchwood Tower; the Doctor faces a dilemma.

No sooner has the Doctor said a tear-stained farewell to Rose Tyler than he finds himself face-to-face with a woman dressed in a fluffy white wedding frock. Who is she? Who is she supposed to be marrying? And how did she get on board the TARDIS?

The Doctor and Martha are transported into danger.

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

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

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.