Rob Brydon returns to the host's chair for the fourth series of the comedy panel show, with lightning-quick team captains David Mitchell and Lee Mack. Over the course of each 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. David Mitchell is joined by Keeley Hawes and Stephen Mangan, while Lee Mack is joined by Kevin Bridges and Professor Brian Cox OBE.