Separated from the Doctor, Clara discovers a new menace from another dimension. But how do you hide when even the walls are no protection? With people to save and the Doctor trapped, Clara comes up against an enemy that exists beyond human perception.

The Doctor is condemned to death by the Sisterhood of the Flame. Solon: Philip Madoc. Condo: Colin Fay. Ohica: Gilly Brown. Maren: Cynthia Grenville.

The Doctor tries to raise an army and calls in favors from allies spread across the cosmos while River Song has something to tell him.

Part 1 of 2. A spaceship crashes into the Thames, causing the world to panic.

It's 2020 and the most ambitious drilling project in history has reached deeper beneath the Earth's crust than man has ever gone before but now the ground itself is fighting back.

Actual date uncertain, based on surrounding schedules and PBS specials.

As the ghosts of loved ones return home, an almighty invasion force threatens to take over Earth.

The Doctor follows a Time Lord distress signal to a mysterious asteroid in a Bubble Universe - could there really be another living Time Lord out there? But the asteroid hides a secret which could threaten the existence not only of the TARDIS crew, but of the TARDIS itself.

The Doctor and his friends must escape an army of Weeping Angels by going through the wreckage of a crashed space liner. Meanwhile in the forest vault, Amy finds herself facing an even deadlier attack.

International superstar Kylie Minogue joins David Tennant for 2007's Doctor Who Special. Stepping back in time, Kylie plays a waitress on the doomed ship, the Titanic. The action picks up from the end of Series Three when the Titanic crashed into the TARDIS.

Hot on the heels of the acclaimed third series, Doctor Who returns for a fourth installment with a familiar face alongside the Doctor. Award-winning actor Catherine Tate returns as the Doctor's new companion, reprising her role as Donna Noble who featured in the 2006 Christmas special The Runaway Bride. Now reunited, the Doctor and Donna travel back to Pompeii in AD 79 on the eve of the infamous eruption where people are slowly turning to stone, investigate a series of grisly murders with the help of Agatha Christie, journey to the home world of the sinister Ood and come face to face an old enemy of the Doctor's. Series Four also sees the return of the Doctor's previous companions - the vivacious Rose Tyler (Billie Piper) and the feisty Martha Jones (Freema Agyeman).

It's 2020 and the most ambitious drilling project in history has reached deeper beneath the Earth's crust than man has ever gone before but now the ground itself is fighting back.

Bodies are found in Victorian Yorkshire with skin that is waxy and glowing red.

Can Rose trust a man with a new face? As the newly regenerated Doctor drifts in and out of consciousness, Christmas becomes a time of terror on planet Earth when the whole of mankind falls under the shadow of the sinister alien Sycorax.

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.

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

The Doctor follows a Time Lord distress signal to a mysterious asteroid in a Bubble Universe - could there really be another living Time Lord out there? But the asteroid hides a secret which could threaten the existence not only of the TARDIS crew, but of the TARDIS itself.

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.

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

Part 2. The Doctor is locked in the perfect prison. Amy, Rory and River Song are being hunted down by the FBI. But, with the help of President Nixon and Neil Armstrong, the Doctor is able to mount a rebellion against an alien invasion.

Kidnapped by his oldest foe, the Doctor is forced on an impossible mission - to a place even the Daleks are too terrified to enter...

The Doctor is trapped, powerless and terrified, on the planet Midnight, as a knocking on the wall begins.

Turning back the clock has consequences.

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.

A solar tsunami sends the TARDIS hurtling towards a factory on earth where human doppelgangers are used to mine dangerous acid. A second wave hits and the 'Gangers' separate. Can the Doctor prevent an all out civil war between the humans and the 'almost people' before the factory explodes?

Every child is scared of monsters, but George's terrified pleas for help reach the Doctor. Because George's monsters are real.

Amy is trapped in a quarantine facility for victims of an alien plague. Can Rory save her before she is killed by kindness?

The TARDIS lands in a hotel where every visitor's room contains their deepest, darkest fears. What lies in wait in the Doctor's room?

The Doctor and Clara travel to the haunted Caliburn House. Within its walls, a ghost hunting Professor and a psychic search for the Witch of the Well. Her apparition appears, but is she really a ghost?

When people start to disappear, a young woman finds cryptic messages bleeding through from a mysterious stranger called the Doctor.

When ghosts of past and future crowd into their lives, the Doctor and Clara are thrown into an adventure that takes them to the very end of the universe.

The Doctor meets Adolf Hitler in 1930s Berlin, where he also encounters the greatest war criminal in the universe.