Three's Company is an American sitcom television series that aired for eight seasons on ABC from March 15, 1977, to September 18, 1984. It is based on the British sitcom Man About the House.

The story revolves around three single roommates: Janet Wood (Joyce DeWitt), Chrissy Snow (Suzanne Somers) and Jack Tripper (John Ritter), who all platonically live together in a Santa Monica, California,^[1] apartment complex owned by Stanley Roper (Norman Fell) and Helen Roper (Audra Lindley). After Fell and Lindley left the series in 1979 for their own sitcom, The Ropers, Don Knotts joined the cast as the roommates' new building manager, Ralph Furley. Following Somers's departure in late 1980, Jenilee Harrison joined the cast as Chrissy's first cousin Cindy Snow, who was soon replaced by Priscilla Barnes as Terri Alden.

The show, a farce, chronicles the escapades and hijinks of the trio's constant misunderstandings, social lives, and financial struggles. A top 10 hit from 1977 to 1983, the series has remained popular in syndication and through DVD releases. The show also spawned similar spin-offs to those that Man About the House had: The Ropers and Three's a Crowd, based upon George and Mildred and Robin's Nest, respectively.