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.

When disaster hits the Titanic, the Doctor uncovers a threat to the whole human race. Battling alongside aliens, saboteurs, robot Angels and a new friend called Astrid, can he stop the Christmas inferno?

Amy Pond and Rory Williams are trapped on a crashing space liner, and the only way the Eleventh 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 of Christmas Eve?

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!

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.

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.

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.

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.

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 for help, he finds himself recruited into River Song’s squad and hurled into a fast and frantic chase across the galaxy. King Hydroflax is furious, and his giant Robot bodyguard is out-of-control and coming for them all! Will Nardole survive? And when will River Song work out who the Doctor is? All will be revealed on a starliner full of galactic super-villains and a destination the Doctor has been avoiding for a very long time.

In this epic two-part finale, the Doctor comes face to face with the mysterious Missy, and an impossible choice is looming. 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.

After Amy enters the TARDIS, Amy is awestruck when she sees what lies inside.

The Moorish general Othello is manipulated into thinking that his new wife Desdemona has been carrying on an affair with his lieutenant Michael Cassio when in reality it is all part of the scheme of a bitter ensign named Iago.

Peter Davison is on a new journey to discover everything he can about the Doctor's Companion. What exactly is a companion's role, how do you actually become a companion, what do they have in common and how have the companions changed over the years?

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 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.

In 2013, something terrible is awakening in London's National Gallery; in 1562, a murderous plot is afoot in Elizabethan England; and somewhere in space an ancient battle reaches its devastating conclusion. All of reality is at stake as the Doctor's own dangerous past comes back to haunt him.

Notorious killer whale Tilikum is responsible for the deaths of three individuals, including a top killer whale trainer. Blackfish shows the sometimes devastating consequences of keeping such intelligent and sentient creatures in captivity.

In his homeland of Alagaesia, a farm boy happens upon a dragon's egg -- a discovery that leads him on a predestined journey where he realized he's the one person who can defend his home against an evil king.

In their new overseas home, an American family soon finds themselves caught in the middle of a coup, and they frantically look for a safe escape in an environment where foreigners are being immediately executed.