The Doctor finds himself with a new companion, and they uncover an ancient alien plan.
When disaster hits the Titanic, the Doctor uncovers a threat to the whole human race.
13/13 Earth has been conquered and the Master rules supreme. Can Martha Jones save the world?
12/13 Harry Saxon becomes prime minister, but his dark ambitions reach beyond the stars.
11/13 Captain Jack Harkness storms back into the Doctor's life.
10/13 Only the Doctor can stop the Weeping Angels, but he's lost in time.
9/13 It's 1913, and war comes to England early as the terrifying Family hunt for the Doctor.
8/13 A schoolteacher called John Smith dreams of adventures in time and space...
7/13 The Doctor and Martha must stop a spaceship from hurtling into the sun.
6/13 Martha has to save her family from the lunatic schemes of the monstrous Professor Lazarus.
5/13 As a new Dalek Empire rises in 1930s New York, the Doctor must enter an unholy alliance.
4/13 The Doctor finds his oldest enemies at work on top of the Empire State Building.
3/13 The Doctor takes Martha to New Earth, where he must battle a powerful old enemy.
2/13 In Elizabethan England, William Shakespeare is under the control of witch-like creatures.
1/13 A Judoon platoon on the moon and a vampiric alien! Martha meets the Doctor.
13/13 As humanity is caught in a war between Daleks and Cybermen, the Doctor faces losing Rose.
12/13 The Cybermen have invaded Earth, but the Doctor and Torchwood confront a greater threat.
11/13 The Doctor has brought Rose to see the Olympics, but a girl threatens billions of lives.
10/13 Who is the sinister and mysterious Victor Kennedy, and why is he keen to find the Doctor?