Celebrity Christmas Special: Catherine Tyldesley, Shirley Ballas, Gareth Malone, Scarlett Moffatt, Nish Kumar

Catherine Tyldesley, Shirley Ballas, Gareth Malone, Scarlett Moffatt and Nish Kumar take part as Richard Ayoade guides them through the four zones, tackling a range of skill, mystery, physical and mental challenges The Maze Master refuses to enter into the festive spirit - especially when he discovers there is a Santa's Grotto installed in the Aztec zone - with Richard Wilson playing Father Christmas.