Dr. Who and Sarah (Elisabeth Sladen) encounter trouble when they answer a distress call from the fringe of the universe. Braun: Terence Brook. Baldwin: Tony McEwan. Sorenson: Frederick Jaeger. Vishinsky: Ewen Solon.

A race of mutants, doomed to endless degeneration, forces the Doctor to help them. Peter Davison. Black Guardian: Valentine Dyall. Mawdryn: David Collings. Nyssa: Sarah Sutton.

The Doctor, Sarah and Harry return to Earth in response to the Brigadier's summons. UNIT are investigating a series of attacks on North Sea oil rigs and have set up a temporary HQ in the Scottish village of Tullock. The attacks are the work of a huge cyborg, the Skarasen, controlled by a group of aliens called Zygons whose spaceship lies at the bottom of Loch Ness.

The Doctor and Romana's search for the Key to Time leads them to warring planets Atrios and Zeos. Tom Baker, Mary Tamm. Shadow: William Squire. Marshal: John Woodvine. Princess Astra: Lalla Ward.

The Captain seizes Romana, and it's the Doctor to the rescue. Romana: Mary Tamm. Dr. Who: Tom Baker. Mr. Fibuli: Andrew Robertson. Nurse: Rosalind Lloyd.

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

Injured by an Orgron gun, the Doctor asks the Time Lords to send the TARDIS after the Daleks. Leaving him asleep, Jo goes to explore the planet Spirodon.

Injured by an Orgron gun, the Doctor asks the Time Lords to send the TARDIS after the Daleks. Leaving him asleep, Jo goes to explore the planet Spirodon.

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 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.

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

Capt. Jack storms back into the Doctor's life; the Tardis travels to the end of the universe.

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

Part 2. With The Doctor imprisoned by The Master, Martha endeavors to save the world.

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.

Donna is determined to find the Doctor, even if it means braving Miss Foster and her hordes of Adipose.

The Doctor and Donna visit Pompeii in AD 79, on the eve of the eruption of Mount Vesuvius.

The Doctor takes Donna to her first alien world, but the Ood-Sphere reveals some terrible truths about the human race.

Part 1. Sontaran warriors set their sights on the Earth and its inhabitants.

Part 2. As poison gas suffocates the Earth's population, the Doctor and UNIT team members work to eliminate the threat.

The Doctor meets the most important woman of his life.

Agatha Christie's 10-day disappearance in 1926 may have been the result of amnesia, a nervous breakdown, or a giant alien wasp.

Part 1. The Doctor and Donna must uncover the truth behind the Nodes and the Data Ghost to uncover the library's secret.

Part 2 . As the shadows rise, the Doctor forges an alliance with the mysterious River Song.

The Doctor is trapped, powerless and terrified, on the planet Midnight, as a knocking on the wall begins.

Donna gets help from a mysterious blond woman.

Part 1. Earth's greatest heroes assemble to fight the New Dalek Empire, but a fearsome old enemy waits in the shadows.

The Doctor is in the house! The RiffTrax house, that is! The stars of Mystery Science Theater 3000®, Mike Nelson, Kevin Murphy and Bill Corbett, are back on the big screen for a legendary riffing of the 1983 Doctor Who film "The Five Doctors." Someone is taking the Doctor's past selves out of time and space, placing them in a vast wilderness - a battle arena with a sinister tower at its center. As the various incarnations of the Doctor join forces, they learn they are in the Death Zone on their home world of Gallifrey, fighting Daleks, Cybermen, Yeti and a devious Time Lord Traitor who is using the Doctor and his companions to discover the ancient secrets of Rassilon, the first and most powerful ruler of Gallifrey.

Join Mike, Kevin and Bill as they join the Five Doctors for one of the most thrilling Doctor Who adventures ever!

Part 2. As Davros and the Daleks threaten the entire universe, the Doctor's companions join forces. However, the prophecy declares that one of them will die.

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 newly regenerated Doctor and Amy Pond must save the world in less than 20 minutes from galactic policemen known as the Atraxi.

The Doctor and Amy travel to Britain of the future, where people live in a giant spaceship; Amy comes across the terrifying Smilers.