Jack Whitehall

David Walliams is joined by award-winning comedian Jack Whitehall. The episode includes Jack and David's inappropriate take on Sherlock and Watson, the world's worst dating show contestant and Jack doingsomething David has never done before - dressing as a woman. There is also the launch of Britain's cruelest reality TV show Celebrity Slammer, in which David finds himself locked up with the Chuckle Brothers.