The widowed Elizabeth Peacock lives at Arlington Grange with her step-daughter, the gorgeous (and fast) Vivienne Scarlet. Mrs White is their housekeeper. Three friends, Professor Peter Plum, Colonel Michael Mustard, and the Reverend Jonathan Green, often come to visit, and someone new is always around - someone everyone will have reasons for wanting dead. But Cluedo is a game show, not a drama series: a film of this week's murderous events is shown to two celebrity teams, who question the suspects and try to work out who did the deed. Members of the cast improvise their answers, and each season has a new cast. Outside the UK, the series was sometimes called Clue.