Jeopardy! is an American television quiz show created by Merv Griffin in 1964. Like most programs of its genre, it features trivia in a wide variety of topics, including history, language, literature, the arts, the sciences, popular culture, geography, and wordplay; however, unlike them, it has a unique answer-and-question format in which contestants are presented with clues in the form of answers, and must phrase their responses in question form. The broadcast history of the show in the United States spans over four decades. The original version debuted on NBC on March 30, 1964, and was part of the network's daytime lineup until January 3, 1975. A weekly nighttime syndicated edition of the show aired from September 9, 1974, to September 5, 1975. A revival, The All-New Jeopardy!, ran as a daytime series from October 2, 1978 until March 2, 1979.