Ross Kemp On Gangs (9pm, Sky1) Fourth series of the BAFTA-winning documentary series starring Ross Kemp.
Big Brother (8 & 10pm, Channel 4) A surprise eviction before Friday's live final.
CelebAir (9pm, ITV2) Reality series where minor celebrities help run an airline. Presented by Anjelica Bell, starring Lisa Scott-Lee, Mica Paris, Chico, Amy Lamé, Tamara Beckwith, Dan O'Connor, Johnny Shentall, Lisa Maffia, Kenzie, Michelle Marsh and Phil Cornwell.
Prison Break (10pm, Sky1) Fourth season of the US drama, continuing the adventures of brothers Michael (Wentworth Miller) and Lincoln (Dominic Purcell) outside Panamanian prison Sona.
God On Trial (9pm, BBC2) Drama about Auschwitz prisoners putting God on trial for allowing Jews to suffer at the hands of Nazis. Stars Stellen Starsgard, Stephen Dillane, Rupert Graves, Antony Sher, Jack Shepherd & Dominic Cooper.
8 Out Of 10 Cats (10pm, Channel 4) Return of the comedy panel show based on statistics and polls, hosted by Jimmy Carr, with team captains Sean Locke and Jason Manford.
Harry & Paul (9pm, BBC1) Second series of the sketch show starring Harry Enfield and Paul Whitehouse as a wide variety of characters.
American Inventor (9pm, Virgin 1) Series 2 of the reality show where inventors have to impress a panel of judges that include Dragons' Den's Peter Jones and George Forman.
Ugly Betty (9pm, Channel 4) Season 2 of the fashion-based US drama continues.
Friday Night With Jonathan Ross (10.35pm, BBC1) Return of the late-night chat show hosted by Jonathan Ross, with guests Kelly Brook, The Mighty Boosh, Team GB's Olympic winners and music from The Streets.
8 Out Of 10 Cats: Big Brother Special (11.05pm, Channel 4) Famous faces from previous Big Brother series participate in the comedy panel show.
Charley Boorman: Ireland To Sydney By Any Means (8pm, BBC2) The motorcycling adventurer uses local transport to travel across the world from Ireland to Sydney, avoiding airlines.