This Friday at 9:00pm on Channel 4, The Crystal Maze returns for a full 20-episode series with host Richard Ayoade. The revived series begins with a star-studded Stand Up To Cancer special episode featuring Vicky Pattison (Geordie Shore), Alex Brooker (The Last Leg), Ore Oduba (Strictly Come Dancing), Lydia Bright (The Only Way Is Essex) and professional…