It's Jack v Jamie in the biathlon - a sport that combines skiing, shooting and lycra. Piers Morgan, Paul Merson and Roisin Conaty join the show.

Sir Bradley Wiggins, Jimmy Carr and Sara Cox join the fun. John Barnes and Kevin Pietersen team up with Jamie and Freddie for a synchronised diving challenge.

There's a load of laughs in store as James Corden welcomes footie star Robbie Keane, funnyman Romesh Ranganathan and national treasure Jessica Ennis-Hill.