The seventh season ends with the discovery of a secret the Doctor planned on taking to his grave.

When the robot grows to an enormous size, Dr. Who tries to find out why. Stewart: Nicholas Courtney. Benton: John Levene. Miss Winters: Patricia Maynard. Kettlewell: Edward Burnham.

The Doctor and his new companion, Clara, fight to save Christmas from the villainous Doctor Simeon and his army of evil snowmen.

The TARDIS lands in Renaissance Italy where Dr. Who becomes involved with nobility, sorcery and evil. Tom Baker. Count Federico: Jon Laurimore. Rossini: Antony Carrick.

The town lives in fear of the mysterious force that is making victims of its citizens. Tom Baker, Elisabeth Sladen. Federico: Jon Laurimore. High Priest: Robert James. Brother: Brian Ellis. Hieronymous: Norman Jones. Marco: Tim Pigott-Smith. Giuliano: Gareth Armstrong. Rossini: Antony Carrick.

At a haunted mansion, Clara and the Doctor join the hunt for the Witch of the Well.

The Doctor and Sarah (Elisabeth Sladen) fight to stop the evil coalition. Giuliano: Gareth Armstrong. Federico: Jon Laurimore. Rossini: Antony Carrick. High Priest: Robert James. Brother: Brian Ellis.

Conclusion. The third-season finale is set one year after the Master's rise to power, with Martha Jones cast as a wandering folk hero, who is believed to be the only human capable of defeating the evil Time Lord. John Barrowman. John Simm.

The Doctor makes a last attempt to defeat the Brethren. Tom Baker, Elisabeth Sladen. Hieronymous: Norman Jones. High Priest: Robert James. Brother: Brian Ellis. Rossini: Antony Carrick. Marco: Tim Pigott-Smith. Giuliano: Gareth Armstrong. Entertainer: Stuart Fell.

The Doctor (Matt Smith) and new companion Clara (Jenna-Louise Coleman) face the sinister Doctor Simeon and an army of snowmen!

Clara wants to see something awesome, so the Doctor whisks her off to the inhabited rings of the planet Akhaten, where the Festival of Offerings is in full swing. Clara meets the young Queen of Years as the pilgrims and natives ready for the ceremony. But something is stirring in the pyramid, and a sacrifice will be demanded.

The TARDIS lands on a ship in the Indian Ocean in the year 1926.

A spaceship salvage team drags the TARDIS on board, sending its systems into meltdown.

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 seventh season ends with the discovery of a secret the Doctor planned on taking to his grave.

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

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.

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.

Part 1. Rose is trapped in the orbit of a black hole; something ancient beneath the planet's surface begins to awaken.

Part 2. As Rose battles the murderous Ood, the Doctor finds his every belief being challenged to the core as the Pit beckons.