Ant and Dec are brought to the big screen in this infectious, yet vacuous comedy. Two chancers from Hackney buy footage of what appears to be a real alien autopsy. But when they find the film has corroded they set about making their own version with the help of a butcher, an undertaker and a kebab shop owner (Omid Djalili).

The concluding episode of the series, and at long last cynical comedian Rick Spleen (Jack Dee) has found fame. Following last week's hostage situation in which he was trapped in the prison library, Rick is fêted in the tabloids as the "prison siege comic". He's inundated with offers, including an invitation to star in a celebrity survival series. But Rick knows he's hit the big time when he's asked to host the Brave Britain Awards - a ceremony broadcast live on TV. Of course he accepts, and, of course, things don't quite go according to plan.

Horrible Histories' talking puppet rat, Rattus Rattus, moves aside to allow Stephen Fry to take the helm as presenter for this new prime-time version of the children's factual show. It's not a new series per se, more a collection of sketches from the first two series. Highlights include a dandy Charles II rapping about the Restoration - "I'm the king who brought back part-y-ing"; an episode of Historical Mastermind with Shakespeare, whose specialist subject is "phrases what I made up"; and a Viking rock group. Despite its frivolous premise there are serious messages, and the show always takes care to ridicule bullies and violence.

Another chance to catch the first episode of series three of the delightful family sitcom starring Hugh Dennis and Claire Skinner. Gran takes the Brockmans on an outing to London. Needless to say it's an agonising day: daughter Karen (Ramona Marquez) thinks modern art is rubbish; Ben (Daniel Roache) plays "spot the chav" and stabs one of the Trafalgar Square lions with a ruler; and older brother Jake (Tyger Drew-Honey) suffers serious trauma when he is unable to send a text message. A fourth series is slated for later this year.

Ex-athlete Dave Wellbeck is chosen as an ambassador to inspire young people about the forthcoming Olympic games, but despite his conscientious and loyal approach he has about as much charisma as a sweaty sports sock and fails to engage his ideals. This spoof about the preparations for the London 2012 Olympics only quietly mocks the games but it has its moments, and tonight's centre around Kay Hope (Amelia Bullmore) as she tries to defend the Olympic park wind turbine. "We need to make sustainability visible. If we lose that, then just what is 2012 about?" "Well, sport, and stuff like archery," comes the reply.

He made his name as Tony Hancock's co-star in Hancock's Half Hour and was a member of the bullion robbery gang in The Lavender Hill Mob but cockney comic Sid James will be remembered most as a star of the Carry On films. This profile, first broadcast in 2000, delves into his private life: his widow Valerie recalls how his hectic lifestyle and workaholic tendencies led to a heart attack at the age of 53, an affair with Barbara Windsor at 59, and his death at age 62 after collapsing on stage at the Sunderland Empire Theatre (unaware of what was happening, the audience laughed, believing the events to be part of the show).

The animated version of Ricky Gervais's podcast, which featured Stephen Merchant and Karl Pilkington and earned a Guinness World Record for the most downloads, returns for a second series. It's the usual banter as Pilkington pitches a peculiar idea for a film and Merchant reads extracts from Pilkington's diary, in which he shares his thoughts about Australia, camping and the in-laws.

The comedy drama about an English writing couple (Stephen Mangan and Tamsin Greig, both good) who take their hit TV comedy to the US continues. Tonight, Beverly (Grieg) has a run-in with a camp stylist who wants to doll up one of her characters to make her more palatable to US viewers. "No one ever stopped watching a TV show because the librarian was too hot!" he shrieks.

10 O'Clock Live, Channel 4, preview

David Mitchell, Lauren Laverne, Jimmy Carr and Charlie Brooker present a new live show with a satirical take on current events.

Recorded during the comic's 2009 tour, this stand-up performance sees the Mock the Week panellist share his thoughts on everything from time travel to teenage parties. The title is the American Beat novelist Jack Kerouac's term for life-affirming weirdos, which Howard uses as a base to gently mock, among other things, ladies on trains, Charles Darwin, and dressing up dogs. The Bristolian's topical comedy show Russell Howard's Good News will return with a new series in spring 2011.