Dr. Who (Tom Baker) discovers a sinister interference with earthlings in suspended animation. Harry: Ian Marter. Sarah: Elisabeth Sladen. Vira: Wendy Williams. Noah: Kenton Moore. Rogin: Richardson Morgan.

The team investigates a mysterious signal being sent out to helpless children.

Torchwood goes underground as the government plans Floor 13.

The TARDIS lands on a seemingly tranquil planet that a team of scientists hopes to colonize. Peter Davison, Janet Fielding. Sanders: Richard Todd. Hindle: {p{Simon Rouse}]. Panna: Mary Morris.

The world focuses on Britain as the 456 announce they are here.

The Doctor battles the Master and a renegade Time Lady named Rani, who are wreaking havoc on a 19th-century mining community. The Master: Anthony Ainley. Peri: Nicola Bryant. Jack Ward: Peter Childs.

The Ambassador shows its intent; the team discovers the truth of 1965.

Gwen must stand alone as the world descends into chaos.

Dr. Who and Romana are diverted to Alzarius on a voyage home. Dr. Who: Tom Baker. Romana: Lalla Ward. Varsh: Richard Willis. Login: George Baker. Adric: Matthew Waterhouse.

With his new assistant Romana (Mary Tamm), the Doctor begins the search for the Key to Time. Dr. Who: Tom Baker. Voice of K9: John Leeson. Vynda-K: Paul Seed. Guardian: Cyril Luckham. Garron: Iain Cuthbertson. Unstoffe: Nigel Plaskitt. Binro: Timothy Bateson.

The Doctor takes Adric and a young air hostess named Tegan Jovanka, who has come aboard the TARDIS by accident, to the planet Logopolis, home of a race of mathematicians whose help he hopes to enlist in reconfiguring the outer shell of the TARDIS. The mysterious, wraith-like Watcher brings Nyssa from Traken to join them and warns of impending danger - something that is borne out as the Master arrives and kills a number of the Logopolitans.

The Doctor, Sarah and Harry arrive on a desolate and apparently deserted Earth to discover that a group of shipwrecked astronauts from a human colony, GalSec, have been lured there by a fake distress call. One of their number, Roth, tells Sarah of an alien conducting gruesome experiments on him and his crewmates. The alien turns out to be a Sontaran, Field-Major Styre, who is compiling a report on human physical and mental capabilities as a...

For the series 10th anniversary special, three incarnations of the Doctor combine forces to defeat the evil Omega in a universe of made of anti-matter. Compiles episodes 1 and 2 from "Doctor Who" series 10.

Omega reveals himself as well as his reasons for why he brought all three Doctors together. The news reveals a startling revelation that causes the Doctor to question what he knows about himself. Compiles episodes 3 and 4 from "Doctor Who" series 10.

Part 1 of two. 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.

Separated from the Doctor, Clara discovers a new menace from another dimension. But how do you hide when even the walls are no protection? With people to save and the Doctor trapped, Clara comes up against an enemy that exists beyond human perception.

One morning in every city and town in the world, the human race wakes up to face the most surprising invasion yet. Everywhere, in every land, a forest has grown overnight and taken back the Earth.

In the world of the Nethersphere, plans have been drawn. Missy is about to come face to face with the Doctor, and an impossible choice is looming. "Death is not an end" promises the sinister 3W but, as the Doctor and Clara discover, you might wish it was.

With Cybermen on the streets of London, old friends unite against old enemies and the Doctor takes to the air in a startling new role. Can the mighty UNIT contain Missy? As the Doctor faces his greatest challenge, sacrifices must be made.

Part 1. "Where is the Doctor?" When the skies of Earth are frozen by a mysterious alien force, Clara needs her friend. But where is the Doctor, and what is he hiding from? As past deeds come back to haunt him, old enemies will come face-to-face.

The doctor's (Peter Cushing) TARDIS time machine takes him, his granddaughters and a friend (Roy Castle) to war-ravaged planet Skaro.

Part 2. Trapped and alone in a terrifying Dalek city, the Doctor is at the heart of an evil Empire; no sonic, no TARDIS, nobody to help. With his greatest temptation before him, can the Doctor resist? And will there be mercy?

Dr. Who (Peter Cushing), his granddaughter, his niece and a London bobby (Bernard Cribbins) find that Daleks have invaded 22nd-century Earth and are turning humans into slaves.

Part 1. When an Underwater Base comes under attack, the Doctor and Clara must save the frightened crew and defeat an impossible threat. But what is behind these terrifying events? And can they really be haunted by Ghosts?

Part 2. On a remote Army outpost, a fearsome alien warlord, the Fisher King, sets in motion a twisted plan to ensure his own survival. The ripples will be felt around the universe. Is this chain of events inevitable? And can the Doctor do the unthinkable?

Part 1. Captured by Vikings, the Doctor and Clara must help protect their village from Space Warriors from the future; the Mire. Outnumbered and outgunned their fate seems inevitable. So why is the Doctor preoccupied with a single Viking girl?

Part 2. England, 1651. The deadly Highwayman 'The Knightmare' and his sidekick stalk the dark streets of London. But when they find loot that's not of this world, they come face to face with the Doctor. Can the Doctor avoid the hangman's noose?

Part 1. The Zygons, a race of shapeshifting aliens, have been living in secret amongst us on Earth, unseen until now! When Osgood is kidnapped by a gang of Zygons, the Doctor, Clara and UNIT must scatter across the world in a bid to set her free.

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.

Madame de Pompadour finds the court at Versailles under attack by sinister clockwork killers and her only hope of salvation lies with the Doctor.

Part 1. Rose discovers that her father is still alive on a parallel Earth.

Part 2. The Cybermen take control of London and start converting the populace; Jackie falls under Lumic's control; the Doctor, Rose and Mickey are reduced to fugitives.

It is 1953 and the coronation of Queen Elizabeth II is taking place, but beneath the celebrations there are rumours of monsters on the streets.

Part 1. Rose is trapped in the orbit of a black hole; something ancient beneath the planet's surface begins to awaken.

Part 2. As Rose battles the murderous Ood, the Doctor finds his every belief being challenged to the core as the Pit beckons.

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.

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.