Location: The Dalek Crucible and Earth Date: 2009 Enemies: The Daleks and Davros The Doctor Who series four finale, sees the Doctor, Donna Noble, Martha Jones, Sarah Jane Smith, Captain Jack Harkness and Rose Tyler fighting to save all of creation from the Daleks. In the midst of the Medusa Cascade and a master plan from Davros that leaves the Earth far from home... can the Doctor and his companions save the Earth, let alone the Universe?

Location: London, Earth Date: 7 November, 1987 Enemy: The Reapers Rose requests a trip back to the day her father, Pete Tyler, died. Reluctantly, the Doctor agrees, but he realises he has made a mistake, when Rose saves Pete from being run over by a car. This has now changed the timeline, and Reapers are transposing themselves all over the Universe. However, this time, the Doctor doesn't have a plan…

In the season finale Mac Taylor has a lot on his plate. He must come to grips with having let a marine die in Beirut in 1983. Also the team must stay one step ahead of a bomber.

In the fourth season finale, Allison tries to help a young couple who thinks their house is haunted, but her efforts result in murder. Meanwhile, Meghan Doyle tries to sell her controlling interest in Joe's invention and Joe tries to save his own stake in it. An unexpected situation occurs between Devalos and Tom Van Dyke and the outcome effects the election for district attorney.

Lake returns to the SVU and works with Tutuola when Tutuola needs to handle some unresolved issues with Darius.