These are the funnies that just couldn't be squeezed in the first time around, and it's 100 per cent brand-new footage. As ever, Rob Brydon hosts proceedings and David Mitchell and Lee Mack are the lightning-quick team captains. Over the course of the show, a stellar cast of celebrity guests reveal amazing stories about themselves - some of which are true, and some of which are not. The aim of the game is to fool the opposition into mistaking fact for fiction and fiction for fact. Featuring in this week's episode are big-name guests from across series four, including Ruth Jones, Ronnie Corbett, Jason Manford, Fern Britton, Keeley Hawes, Richard E Grant, Joanna Page, John Bishop, Patrick Kielty, Bernard Cribbins, Stephen Mangan, Jack Dee, Patsy Palmer, Martin Clunes, Professor Brian Cox, Sanjeev Bhaskar, Peter Serofinowicz, Kevin Bridges, Chris Addison, Deborah Meaden, Julian Clary and Holly Walsh. Did Professor Brian Cox once cause the Hadron Collider to be shut down after he spilt yoghurt in it? Does Martin Clunes sometimes change the order in which he puts on his shoes and socks to spice up his daily routine? And was John Bishop once asked to leave the cinema for crying too loudly?