Is our skin crawling with mites? Do we think we're better looking than we actually are? And do we enjoy movies more if someone spoils the ending? Martin Clunes, Jimmy Carr and Aisling Bea bid to find out.

Pull up a chair as host Lee Mack, The Great British Bake Off's Noel Fielding and comedians Roisin Conaty and Jason Manford go to any lengths to test wacky facts.