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.

Orbiting a quiet backwater planet, the massed forces of the universe's deadliest species gather, drawn to a mysterious message that echoes out to the stars. And amongst them, the Doctor. Rescuing Clara from a family Christmas dinner, the Time Lord and his best friend must learn what this enigmatic signal means for his own fate and that of the universe.

The Doctor and Clara face their Last Christmas. Trapped on an Arctic base, under attack from terrifying creatures, who are you going to call? Santa Claus!

The Doctor has retired to 1892 London. Despite the protests of his allies, he is determined to keep out of mankind's affairs. However, a governess named Clara has stumbled upon a plot which only the Doctor can unravel, involving the death of her predecessor in ice and the sinister Dr. Simeon, who controls monsters made of sentient snow. And there is another mystery afoot: Clara is the spitting image of Oswin Oswald, whom the Doctor saw die in the Dalek asylum...

A young bride in the midst of her wedding finds herself mysteriously transported to the TARDIS. The Doctor must discover what her connection is with the Empress of the Racnoss's plan to destroy the world.

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

The newly-regenerated Doctor arrives in Victorian London, and Clara Oswald struggles to embrace the man he has become. All the while, they reunite with the Paternoster Gang to investigate a series of combustions that have been occurring all around the city.

As the Twelfth Doctor nears regeneration, he stumbles on his first incarnation, also refusing to change. It takes a captain, a glass avatar and a familiar face to convince the Doctors the universe still needs them.

It's Christmas Eve, 1938, when Madge Arwell comes to the aid of an injured Spaceman Angel as she cycles home. He promises to repay her kindness - all she has to do is make a wish.

The Doctor arrives in Victorian London. It's Christmas, but snow isn't the only thing descending on the tranquil and jubilant civilization, as familiar silver giants from an alternate reality are amassing in numbers. The Cybermen are on the move again, and the only beings who can stop them are the Doctor and... another Doctor?

The Doctor struggles to help the only remaining crewmember of a crashing gunship. The people of the planet below offer to save his life, but at a dear cost to the life he's lived for hundreds of years.

Miser Ebenezer Scrooge is awakened on Christmas Eve by spirits who reveal to him his own miserable existence, what opportunities he wasted in his youth, his current cruelties, and the dire fate that awaits him if he does not change his ways. Scrooge is faced with his own story of growing bitterness and meanness, and must decide what his own future will hold: death or redemption.

Three Russian friends work in New York, party hard and chase women. It's great times until they get cursed by a drunken Russian night club owner, who turns out to be Saint Valentine. St. Valentine's curse is simple - the guys lose all their manly powers until they find their true love. It turns out to be harder than it sounds - our boys have a lot of growing up to do. Fast.

In a South Yorkshire city, Ryan Sinclair, Yasmin Khan and Graham O'Brien are about to have their lives changed forever, as a mysterious woman, unable to remember her own name, falls from the night sky. Can they believe a word she says? And can she help solve the strange events taking place across the city?

The newly-regenerated Doctor helps UNIT battle a sentient robot being manipulated by a corrupt scientific organization.

A group of kids grow up on the short, wrong (east) side of the Sonnenallee in Berlin, right next to one of the few border crossings between East and West reserved for German citizens. The antics of these kids, their families, of the "West German" friends and relatives who come to visit, and of the East German border guards, all serve to illustrate the absurdity of everyday life on the Sonnenallee, and therefore throughout the former East Germany.

A young and cynical female journalist learns love may transcend trials and time as she discovers a story that will change her life forever. When war separates lovers on their wedding anniversary Feb. 14, 1944 at LA Union Train Station, Navy pilot Neil Thomas makes a promise he isn't sure he can keep - to return to the train station safe by their next anniversary. For sixty years Caroline Thomas keeps her promise by waiting at the train station until her missing in action husband can finally keep his with the "lost valentine." The message and meaning shows romance and love can be real; worth fighting, and maybe even dying for.

A beautiful temptress re-kindles an old romance while trying to escape her past during a tension-packed train journey.

An ex-cop in self-imposed witness protection in Mexico becomes a target when a fight video of his apprentice goes viral.