Dr. Who discovers a sinister interference with Earthlings in suspended animation. Harry: Ian Marter. Sarah: Elisabeth Sladen.

Season 4 debuts with a collision involving the TARDIS and a spacecraft replica of the Titanic. Kylie Minogue plays a waitress who helps the Doctor stand against a race of android angels.

Part two of two. The human race is caught in the middle of an interplanetary war, as two of the Doctor's deadliest enemies - the Daleks and the Cybermen - battle it out on the streets of present-day London. As the Daleks prepare to activate their mysterious secret weapon, the Doctor joins forces with rebels from the Cybermen's own world to get rid of both alien armies

A young woman receives a series of cryptic messages from the Doctor as she tries to evade the Weeping Angels, a terrifying group of statue-like creatures hidden in an abandoned haunted house. With guest stars Carey Mulligan (An Education) and Finlay Robertson (How Not to Live Your Life) alongside David Tennant and Freema Agyeman

Part one of two. The Tardis takes Donna and the Doctor to the universe's largest library, which was sealed up and abandoned 100 years ago amid stories of terrifying living shadows within. With Colin Salmon and Steve Pemberton, and Alex Kingston making her first appearance as the mysterious River Song

Part two of two. The Doctor joins forces with Professor River Song as the Vashta Nerada advance, and is stunned by shocking revelations about his future, while the Nodes declare Donna is doomed. With guest stars Alex Kingston, Colin Salmon and Steve Pemberton

Part one of two. Former sidekick Martha Jones summons the Time Lord back to modern-day Earth, where an old enemy lies in wait. With mysterious Atmos devices spreading across the world, Donna discovers that even her own family are not safe from the alien threat. Freema Agyeman and Christopher Ryan guest star

Part two of two. The Sontarans activate their masterplan and begin to choke the planet, while Unit are left defenceless, with a traitor in their ranks. As interplanetary war edges closer, the Doctor considers making the ultimate sacrifice to keep both Martha and Donna alive. Freema Agyeman and Christopher Ryan guest star

Who will rescue the Doctor and Clara before they too fall victim to the Crimson Horror?

A man named Elton is plunged into a world of living nightmares when he becomes obsessed with the Doctor, Rose and their mysterious blue box.

The Doctor plans to show Rose the London Olympics in 2012; a mother hides her daughter's unearthly powers.

The human race rejoices as ghosts of loved ones return home; an invasion force threatens modern day Earth.

Two mighty armies wage war across the Earth; terror emerges from beneath Torchwood Tower; the Doctor faces a dilemma.

No sooner has the Doctor said a tear-stained farewell to Rose Tyler than he finds himself face-to-face with a woman dressed in a fluffy white wedding frock. Who is she? Who is she supposed to be marrying? And how did she get on board the TARDIS?

The Doctor and Martha are transported into danger.

Witches cast a spell on the Doctor and Martha.

The Doctor takes Martha to the planet New Earth in the future where the streets are ruled by sinister pharmacists.

1. A fossilized hand is discovered in a quarry explosion. Dr. Who: Tom Baker. Sarah: Elisabeth Sladen. Zazzka: Roy Pattison. Abbott: David Purcell. Intern: Renu Setna. Dr. Carter: Rex Robinson. Guard: Robin Hargrave.

2. Entranced by the hand, Sarah carries it to a nuclear reactor. Tom Baker. Watson: Glyn Houston. Miss Jackson: Frances Pidgeon. Driscoll: Roy Boyd. Elgin: John Cannon.

3. Using nuclear power, the hand regenerates itself into a woman. Tom Baker. Eldrad: Judith Paris. Driscoll: Roy Boyd. Watson: Glyn Houston. Miss Jackson: Frances Pidgeon.

4. The Doctor returns Eldrad to her planet. Elisabeth Sladen. King Rokon: Roy Skelton. Kastrian Eldrad: Stephen Thorne.

Part 1. The TARDIS lands in 1930s New York, where people are disappearing from the streets.

Part 2. The Doctor forms a deadly alliance to save humanity.