The main story arc of the series focused on the significance of the character of Clara, whom the Doctor had encountered twice before as Oswin in "Asylum of the Daleks" and as a governess in "The Snowmen". It also features the recurring appearance of the Doctor's enemy, The Great Intelligence.

special episode of Doctor Who

The Tenth Doctor meets one of his previous incarnations.

Good as Gold was a mini-episode of Doctor Who written by the winners of a Blue Peter script-to-screen competition.
Bored of not having any adventures lately, the Doctor and Amy get a bit more than they asked for when they set out on one. Landing in London 2012, there's only one piece of advice that can help them now: Whatever you do — don't blink!

Death Is the Only Answer was a mini-episode of Doctor Who broadcast as part of Doctor Who Confidential.
In the control room of his TARDIS, the Eleventh Doctor is celebrating his acquisition of a new fez formerly owned by his old friend Albert Einstein. The Doctor trips near the console, knocking the fez out of his hands and onto a lever on the console. The Doctor accidentally pushes another lever, causing the fez to vanish. A time portal appears and Einstein himself stumbles through it with the Fez, bewildered.
Einstein had been working on his own attempt at a time machine, but when he tried to turn it off, he arrived in the TARDIS. Einstein also thought that he'd discovered the vital part of finishing his time machine--a green liquid, which he believed to be bionic fusion liquid. After scanning the liquid, the Doctor informs Einstein that he is wrong. When Einstein walks away from the console to run some tests on the liquid, the flask suddenly bubbles over and the liquid splashes onto his face, turning him into an Ood who repeatedly repeats the phrase, "death is the only answer."
The Doctor has the TARDIS generate an energy field which turns Albert back into his normal self. The Doctor recommends that Albert keeps his fried hair, as it looks "more sciencey". The Doctor drops Albert off on 18 September 1945, and leaves for another adventure; unnoticed by the Doctor, a bit of Einstein's liquid remains on the console room floor, moving on its own.

special episode of Doctor Who

The Doctor returns, alongside newly weds Amy and Rory, to face monsters and mysteries and adventures all across time and space. Together they find themselves in sixties America, battling the invasion the world forgot, then aboard a pirate ship on the high seas of 1696, to solve the mystery of the Siren. In a bubble universe at the edge of reality, the Doctor meets an old friend with a new face.

It’s the deepest part of winter, the exact midpoint, Christmas Eve – half way out of the dark. Amy and Rory are trapped on a stricken space liner that’s plummeting through banks of thick icy fog to the surface of the planet below. Only one man has the power to save them; only one man is in possession of a machine that can clear the fog and let them land safely. That man is Kazran Sardick, a rich but lonely old miser who rules Sardicktown with a sky-mast of iron.
The Doctor’s only chance of rescuing the ship’s 4,000 passengers is to save Kazran’s soul and show him that life is worth living. For this he needs to go back, way back, to when Kazran was a boy with a life full of promise. But can the Doctor put a song in Kazran’s heart and love in his life, in time for Christmas? Can he bring him out of the dark?

Episode 1: The Eleventh Hour
Episode 2: The Beast Below
Episode 3: Victory of the Daleks
Episode 4: The Time of Angels
Episode 5: Flesh and Stone
Episode 6: The Vampires of Venice
Episode 7: Amy's Choice
Episode 8: The Hungry Earth
Episode 9: Cold Blood
Episode 10: Vincent and the Doctor
Episode 11: The Lodger
Episode 12: The Pandorica Opens
Episode 13: The Big Bang

The Doctor faces the end of his life as the Master's plans hurtle out of control. With the sound of drums growing louder, and an ancient trap closing around the Earth, the Doctor and Wilf must fight alone. But sacrifices must be made, and the deadly prophecy warns: "He will knock four times."

The Ood have given a warning to The Doctor. The Master is returning yet that is not the biggest threat. A darkness is coming which brings with it The End of Time.

In a Mars base, the inhabitants are being infected by a mysterious water creature which takes over its victims. The Doctor is thrust into the middle of this catastrophe, knowing a larger one is waiting around the corner.

A meeting in a London bus with jewel thief Lady Christina takes a turn for the worst for the Doctor when the bus takes a detour to a desert-like planet, where the deadly Swarm awaits.

The TARDIS lands in London on Christmas Eve, 1851 and almost immediately the Doctor hears his name being called. When he meets the woman shouting for him she fails to recognise him and continues calling until another man arrives and claims to be the Doctor and acknowledges the woman, Rosita, as his companion.
The Doctor then attempts to help the newcomer lasso a man-size dog-like creature which has a cyber-mask, but it drags them both through the upper floor of a warehouse until Rosita cuts the rope, saving them both from plunging through a high window. The newcomer explains he has lost his memory, and the Doctor assumes he is a later incarnation, and follows him to the house of a murdered vicar, where the new Doctor says he is investigating the murder of the vicar and a teacher called Jackson Lake, and that his memory was wiped when he was attacked by the Cybermen.
At the house the Doctor finds primitive memory devices called infostamps and says they have been used by the Cybermen because of the lack of technology in 19th century London. Two Cybermen attack the Doctors, but are destroyed when the new Doctor sets off a feedback loop in one of the infostamps, something he said was the cause of his memory loss. The new Doctor takes the Doctor back to his base, in the stables of an Inn, and shows him his TARDIS, a balloon (Tethered Aerial Release, Designed In Style).
The Doctor finds another infostamp in the new Doctor's luggage, this one filled with information about him, and concludes that the new Doctor is really Jackson Lake, but his memory has been over-written with details of the Doctor's life by the infostamp, which itself may have been stolen from the Daleks. Lake's memory starts to return, and he remembers his wife being killed and his son being taken.
Meanwhile, Mercy Hartigan, a workhouse matron has joined the Cybermen and had them kill the vicar so all the local gentlemen would attend his funeral; she arrives with the Cybermen to select four of them (the rest are killed) so she can have the children in their workhouses (including Lake's son) as a labour force for the Cybermen, who are building a 'CyberKing' to rule Earth.
The Doctor is unable to stop the rise of the 200-foot tall CyberKing, which is controlled by a reluctantly-conditioned Miss Hartigan, but rescues the children. He then uses Lake's balloon TARDIS to get up to the CyberKing throne, where Miss Hartigan is held. He breaks her conditioning, and her human anger destroys the Cybermen. The Doctor uses the Cybermen's own time travel device to drag the CyberKing back into the Void, saving London. The danger over, Lake, his memory now returning, hires Rosita as nursemaid for his son and gets to see inside the real TARDIS, before insisting that the Doctor joins them for Christmas dinner.

special episode of Doctor Who

Adventures in time and space with the Tenth Doctor and his companion Donna Noble.

When the hospital she works at is transported to the moon, medical student Martha Jones joins forces with The Doctor to hunt down an alien fugitive before the oxygen runs out

special episode of Doctor Who