The Crystal Maze: he Maze was split into four time zones, Aztec, Futuristic, Medievil, and Industrial, which became the Ocean zone in the last three series. Within each zone the team captain would choose between a skill, physical, mental or a mystery challenge for one of the other players. Each game lasts 2 to 3 minutes. The presenter would then open the door, start the time by keying in a code, starting the waterclock, turning over a sand timer, or starting a stop clock. the presenter would thenclose the doorand the game would start. The rest of the team could then help (or hinder) their teammate by shouting advice and suggestions, while viewing through monitors or gaps in the doors/walls. Completing a game correctly caused a contraption of some variety to release a time crystal. If the contestant failed to get out of the cell within the time limit (regardless of whether they had the time crystal or not) was locked in the cell. They could be release and play a further part in the show, but only if the team sacrificed one of the teams time crystals.