The Doctor follows a mysterious creature attacking Scottish oil rigs to Loch Ness where not only does he discover that the legendary monster does exist, but that is also a weapon of the Zygons in their plan to overpower the planet.

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 Sixth Doctor boldly claims the Valeyard's evidence has been falsified, and the Matrix has been tampered with.

With the Tardis immobilized, the Doctor gets pulled into a whirlpool in space.

Romana is trapped aboard the Skonnon ship while the Doctor is abandoned in the whirlpool.

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.

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.

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?

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.

It's the Tenth Doctor's final journey - but his nemesis, The Master, has been reborn. A terrible shadow falls across the Universe as great danger approaches, and the Doctor faces the end of his life as the Master's plans hurtle out of control.

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

The Doctor makes a final stand against an army of Cybermen, to protect a tiny band of humans from destruction.

The Twelfth Doctor makes his debut in BBC America's time-honored Doctor Who Christmas special. Peter Capaldi, Jenna Coleman and guest star Nick Frost strap in for a dangerous sleigh ride through space and time in the Steven Moffat helmed special.

It's Christmas Day on a remote human colony and the Doctor is hiding from Christmas Carols and Comedy Antlers. But when a crashed spaceship calls upon the Doctor, he finds himself recruited into River Song's squad and into a chase across the galaxy.

The Doctor join forces with a masked Superhero for an epic New York adventure. With brain-swapping aliens poised to attack, the Doctor and Nardole link up with an investigative reporter and a mysterious figure known only as The Ghost.

Amy and Rory are trapped on a crashing space liner, and the only way The Doctor can rescue them is to save the soul of a lonely old miser. But is Kazran Sardick, the richest man in Sardicktown, beyond redemption? And what is lurking in the fogs?

Evacuated to a house in Dorset from war-torn London, Madge Arwell and her two children, Lily and Cyril, are greeted by a madcap caretaker whose mysterious Christmas gift leads them into a magical wintry world.

Christmas Eve 1892 and a chilling menace threatens humankind - but with the Doctor in mourning, it takes old friends and an unorthodox young governess to get him fighting to save the world again.

The Doctor takes Rose on her first voyage to a time when the sun is about to swallow Earth and a murderer is at work.

Author Charles Dickens joins the Doctor and Rose in 1869 Victorian Cardiff to battle the ethereal Gelth.

Part 1. The Doctor takes Rose home, but the world goes on alert when an alien spacecraft crashes in the Thames.

Part 2. The world edges toward mankind's first interplanetary war, as the Doctor and Rose try to escape from Downing Street.

Part 1. An unearthly child haunts the bomb sites of London.

Part 2. The child's plague spreads through wartime London, and a zombie army is on the march; the Doctor and Rose form an alliance with an intergalactic con-man.

The Doctor encounters an enemy from his past when the crew decides to take a holiday; an alien plot is behind the construction of a nuclear power plant in Cardiff.

Part 1. The Doctor, Rose and Capt. Jack have to fight for their lives, but the Doctor soon realizes that Armageddon is fast approaching.

Part 2. Rose and the Doctor's friendship is put to the test, as Earth plunges into an epic war with the human race being slaughtered.

The Doctor and Martha are transported into danger.

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.

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.

The TARDIS arrives at a Human colony that appears to be run along the lines of a holiday camp. Everyone seems very happy, but their happiness is not real; something is controlling them.

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.

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

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.

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.

The Doctor finds himself and those around him in serious danger after a strange bus ride.

The Doctor helps combat a crisis from beneath Mars' surface.