The Doctor investigates a contemporary London school which is being haunted by strange, bat-like creatures at night. While at the school, the Doctor finds his old friend, Sarah Jane Smith, already working undercover. Both have old scores they must settle, and Rose discovers the true legacy of being a Time Lord's companion.

Conclusion. The FBI pursues Amy, Rory and River Song while the Doctor is imprisoned.

With the Doctor on another planet, the Kraals begin their invasion of the earth. Tom Baker, Elisabeth Sladen. Faraday: Patrick Newell. Grierson: Dave Carter. Tessa: Heather Emmanuel. Matthews: Hugh Lund.

Rose and the Doctor visit London in the near future to watch the Olympic games, and learn that the disappearances of children may be linked to a little girl's drawings.

The Doctor finds love - and evil droids - in 18th-century France. Madame de Pompadour is being haunted by a stranger called the Doctor. Can he save her from the clockwork killers?

The Doctor recruits medical student Martha Jones (Freema Agyeman) to help him thwart an army that has transplanted a London hospital onto the moon.

Cybermen take control of London. The Doctor and Rose are reduced to fugitives in a world of terror.

Clara and the Doctor arrive at Caliburn House, a haunted mansion sat alone on a desolate moor. Within its walls, a ghost hunting Professor and a gifted psychic are searching for the Witch of the Well. Her apparition appears throughout the history of the building, but is she really a ghost? And what is chasing her?

A group of astronauts returns from Mars with a peculiar problem: Their touch brings death.

The Doctor and the Ponds puzzle over an unlikely invasion of Earth - millions of sinister black cubes that arrive overnight, almost like presents falling from the sky. There is no indication of what might be inside them or who sent them. The international community is at a loss. It is left to The Doctor to unearth who is behind the mystery.

Must-see sci-fi fun as David Tennant returns for his second festive outing as the time-bending traveller - but sadly without sidekick Billie Piper, who was parted from the Doctor at the end of the last series and is now moping around in a parallel universe. It's already been announced that Freema Agyeman will be taking her place as the Doctor's new companion, but that's not until the new series in April. For now - as anyone who saw the closing seconds of the last episode will know - the Doctor has yet another lady in tow, none other than comedienne Catherine Tate. She plays Donna, a bride-to-be who's running late for her wedding, and has somehow materialised on board the Tardis. This results in a race to get her to the church on time - but when the mysterious Empress of Racnoss (Cutting It's Sarah Parish) joins the chase, it becomes clear Donna is the key to an ancient alien plan to destroy the Earth

Martha Jones's life takes a dramatic turn when the hospital she works in is transported to the moon, confronting her with a force of alien stormtroopers called the Judoon, a bloodsucking alien fugitive and a first meeting with the Doctor. David Tennant stars as the time traveller, with Freema Agyeman making her debut as his companion

The Doctor takes Martha to Elizabethan England, where the discovery that William Shakespeare is under the control of sinister witch-like creatures throws the pair into a battle to stop history being changed for ever. Time-travelling adventure, starring David Tennant and Freema Agyeman, with Dean Lennox Kelly as the celebrated playwright

The Doctor decides to show Martha what the future has in store by taking her to New Earth, the same planet where he and Rose fought zombie patients in a hospital on his last visit. However, on their arrival the pair are shocked to discover an entire city has become a deadly trap. Guest starring Ardal O'Hanlon (Father Ted), with David Tennant and Freema Agyeman

The Doctor takes Martha back to present-day Earth, where she finds her sister working for an elderly scientist who has built a machine to reverse the ageing process. When he tests it on himself, his youth is restored, but the experiment goes wrong and he transforms into a ravenous monster that must feed on humans to survive. Guest starring Mark Gatiss and Thelma Barlow

The Doctor and Martha face a desperate race against time to save the crew of a spaceship that is on course to hit the sun. The pair have only 42 minutes to prevent a collision - and their task is made even more difficult by crew members who have been possessed by a mysterious force and a gang of saboteurs. Former EastEnders actress Michelle Collins and ex-Hollyoaks star Elize du Toit appear alongside David Tennant and Freema Agyeman

A mysterious gift from a madcap caretaker leads Madge Arwell and her kids to a magical wintry world.

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.

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.

The Doctor and Amy meet Winston Churchill during a trip back to World War II, where they also encounter the Daleks.

Clara and the Doctor arrive at Caliburn House, a haunted mansion sat alone on a desolate moor. Within its walls, a ghost hunting Professor and a gifted psychic are searching for the Witch of the Well. Her apparition appears throughout the history of the building, but is she really a ghost? And what is chasing her?

Part 1. The Doctor hunts the last of the Weeping Angels through the Maze of the Dead; the mysterious River Song is back in the Doctor's life, but he doesn't know if he can trust her.

Part 2. The Doctor and his friends are forced to escape through the forest vault after they are surrounded by the Weeping Angels.

The Doctor suspects something isn't quite right with the daughters of the family that protects the streets of Venice.

The Doctor returns to Amy on the night before her first child is born.

The Doctor finds love - and evil droids - in 18th-century France. Madame de Pompadour is being haunted by a stranger called the Doctor. Can he save her from the clockwork killers?

Part 1. Scientists discover something isn't right beneath Earth's crust while drilling.

Part 2. Scientists discover something isn't right beneath Earth's crust while drilling.

A spaceship salvage team drags the TARDIS on board, sending its systems into meltdown. As the Doctor marshals the motely salvage crew outside, he realizes Clara is still trapped within his malfunctioning ship, pursued by a dangerous group of ossified monsters. He has just 30 minutes to find Clara and save his TARDIS before it self-destructs.

Amy battles an alien in France with Vincent Van Gogh.

The Doctor investigates a mysterious staircase in a building where people can go up, but never down.

Part 1. A message on a cliff; a puzzle box that opens from the inside; the fates draw closer for the TARDIS.

The TARDIS becomes marooned on a 17th-century pirate ship manned by a crew under attack by a beautiful sea creature.