The Doctor is reunited with runaway bride Donna Noble. Together they embark on a journey that will end in a battle with the Daleks to prevent the destruction of reality itself.
Starting tonight, BBC Three will be repeating Series Four of Doctor Who and the cut down Confidential that accompanies the episode.
This week you'll get to re-visit episodes one to four, with the following transmission times:
Episode 1: Partners In Crime - 19:00.
Confidential: A Noble Return - 19:50.
Episode 2: The Fires of Pompeii - 19:00.
Confidential: The Italian Job - 19:50.
Episode 3: Planet of the Ood - 19:00.
Confidential: Oods and Ends - 19:45.
Episode 4: The Sontaran Stratagem - 19:00.
Confidential: Send in the Clones - 19:45.
Don't forget if you miss an episode you can also catch it on iPlayer for up to seven days.