|'Comic Relief 2011' - Friday, BBC1, 7PM|
Bang Goes The Theory (BBC1, 7.30pm) Series 4 of the science entertainment series. (1/8)
Only Connect Comic Relief Special (BBC4, 8.30pm) Special edition of the highbrow quiz. Hosted by Victoria Coren.
The Secret War On Terror (BBC2, 9pm) Investigation into the gathering of intelligence post-9/11. Hosted by Peter Taylor. (1/2)
Around The World In 60 Minutes (BBC4, 9pm) Documentary peering down on Earth from 200-miles above its surface, from the International Space Station.
The Event (Channel 4, 10pm) Season 1 of the US sci-fi mystery drama continues. Double bill. (11-12/22)
Twenty Twelve (BBC4, 10.30pm) Mockumentary about a team responsible for organizing the 2012 Olympic Games. Stars Hugh Bonneville, Jessica Hynes, Amelia Bullmore, Olivia Colman & Karl Theobald. Narrated by David Tennant. Written by John Morton (People Like Us.) (1/6)
Lily Allen: From Riches To Rags (Channel 4, 10pm) Reality series following singer Lily Allen and her half-sister Sarah Owen as they try to start a vintage clothing store. (1/3)
Wars Of The Roses: A Time Team Special (Channel 4, 8pm) Special edition of the archaelogical series, with the team digging at the site of the Battle of Bosworth.
The Secret World Of Whitehall (BBC4, 9pm) Documentary on the workings of the Cabinet Office, 10 Downing Street and the Private Office network. (1/3)
Leaving Amish Paradise (BBC2, 9pm) Documentary where a group of people from an Amish community face the modern world.
Kidult: Marathon Boy (BBC4, 10pm) Documentary about the youngest ever marathon runner, a four-year-old boy from an Indian slum.
The Big Red Nose Desert Trek (BBC1, 9pm) Documentary on the recent endurance test for Comic Relief, where nine celebrities walked across Kenya's Kaisut Desert for five days. Featuring Ronni Ancona, Craig David, Lorraine Kelly, Scott Mills, Olly Murs, Dermot O'Leary, Nadia Sawalha, Kara Tointon & Peter White.
Christopher & His Kind (BBC2, 9.30pm) Drama about the formative years of author Christopher Isherwood, who escaped the repression of 1930s Britain for the politically-unstable Berlin. Starring Matt Smith, Lindsay Duncan, Imogen Poots, Toby Jones & Douglas Booth.
Christopher Isherwood: A Born Foreigner (BBC4, 11pm) Repeat of the 1969 interview with author Christopher Isherwood, where he discussed his novels, screenplays, religion, and life abroad
The Only Way Is Essex (ITV2, 10pm) Series 2 of the reality entertainment drama about a group of young people from Essex.