Today on TV

Doctor Who (6:30 and 9 p.m., Sci Fi): In the season finale, the Doctor, Donna Noble, Martha Jones, Sarah Jane Smith, Captain Jack Harkness and Rose Tyler fight to save all of creation from the Daleks. (90 minutes)

Lemony Snicket's A Series of Unfortunate Events (7 p.m., Ch. 4): 2004 fantasy/adventure. (Repeat)

Stargate Atlantis (8 and 10:30 p.m., Sci Fi): The Daedalus malfunctions, leading to conflicts with aliens.

Psych (8 and 11 p.m., USA): Somebody is sabotaging a daredevil's stunts.

Swingtown (9 p.m., Ch. 2): Tom and Trina close their relationship.

20/20 (9 p.m., Ch. 4): Interviews with the Jonas Brothers and Carla Bruni-Sarkozy.

Monk (10 p.m., USA): Natalie wins the lotto — but the machine is rigged.