 Other principal cast members include Jessica Hynes, Darren Boyd, Steve Edge, Peter Capaldi, and Andrea Riseborough.Harry Kane and Karl Allen are best friends who work together in a successful and popular magic double act, with Harry's wife Carol working as their assistant.After one show, however, Harry discovers Karl and Carol backstage in a magic box having sex (during an agreement between Harry and the theatre owner about letting the act go on for 4 more weeks and letting them do an act on a cruise ship).