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`Doctor Who' is a classic science-fiction programme with a cult following. The Doctor is called a `Time Lord', a time-travelling scientist from a far off planet, who travels through time and space in a shop known by the acronym TARDIS. A TARDIS is a machine that is larger on the inside than the outside and is supposed to change its appearance based on its surroundings. The Doctor is also able to evolve his biology, so he appears as many different people throughout the series. The Doctor loves Earth, so he makes many trips here to save the planet, or to enlist earthlings to help him with tasks in the galaxy.
Horror of Fang Rock: Part 1. On the island of Fang Rock, the Doctor and Leela find a murderous creature is at large.
Horror of Fang Rock: Part 2. Everyone sheltering in the lighthouse is in peril from the alien killer stalking them.
Horror of Fang Rock: Part 3. The Doctor discovers that he may unwittingly have trapped the creature inside with him.
The alien Rutan picks off the remaining humans one by one.
The Invisible Enemy: Part 1. The Doctor is infected by an alien virus and becomes possessed by the will of the Nucleus.
The Invisible Enemy: Part 2. As the Doctor's condition worsens, he tells Leela to take him to the Bi-Al Foundation.
The Invisible Enemy: Part 3. The Doctor and Leela have been cloned, miniaturised and injected into the Doctor's body.
The Invisible Enemy: Part 4. The Nucleus has escaped the Doctor's body and grown to human size.
At Fetch Priory a mysterious skull is exerting a deadly influence on those around it.
The Doctor realises the skull is an ancient horror from the mythology of his own people.
Stahl intends to control the power of the Fendahl for himself.
Thea has become the Fendahl Core and transforms everyone into Fendahleen.
Pluto has been turned into a factory where the ruthless Company exploits its workers.
The Doctor is taken prisoner by the Gatherer and sent to the Correction Centre.
Leela has been captured by the Gatherer and is sentenced to death by public steaming.
The rebels turn on the Gatherer while the Doctor confronts the real head of the Company.
The TARDIS lands on a spaceship crewed by the survivors of Minyos.
The Minyan survivors discover what they have been searching for.
The Doctor and Leela attempt to access the Citadel of the Seers to rescue Idas's father.
The Minyans are eager to recover the race banks that they have waited so long to find.
The Invasion: Episode 1 (Animated). The TARDIS lands in London and the travellers agree to help find Professor Watkins.
The Invasion of Time: Part 1. The Doctor, after meeting with aliens, returns to Gallifrey and claims the presidency.
The Invasion of Time: Part 2. The Doctor is president and immediately orders K-9 to lower Gallifrey's defences.
The Invasion of Time: Part 3. The Doctor has betrayed his own people and enabled the Vardan invasion of Gallifrey.
The Invasion of Time: Part 4. As the Vardans fully materialise on Gallifrey, the Doctor prepares to spring his trap.
The Invasion of Time: Part 5. The Sontarans intend to use the power of the Time Lords to rampage through all of time.
The Invasion of Time: Part 6. Stor the Sontaran gains access to the TARDIS in search of the Great Key of Rassilon.