It spawned games, magazines and even live experiences where you and your family could go and grab yourself an allusive crystal of your own. Originally aired on Channel 4 from 1990 to 1995, it had some of the highest viewing figures for the channel. Hosted by the weirdly wonderful Richard O'Brien (Of The Rocky Horror Picture Show fame) and then Ed Tudor-Pole (of Tenpole Tudor fame), this game show put teams of people through an eclectic mix of challenges.
Those of us old enough, will remember the camp craziness that was The Crystal Maze.