The Crystal Maze is a British game show on Channel 4. It ran from 1990-1995 and was revived in 2016. A team of six players completed challenges to win crystals. It was presented by Richard O'Brien from series 1 to 4 and Ed Tudor-Pole in series 5 and 6. Stephen Merchant presented an episode in 2016. Richard Ayoade presents in 2017.