Three's Company is an American sitcomtelevision series that aired eight seasons onABC, 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 building owned by Stanley Roper(Norman Fell) and Helen Roper (Audra Lindley). Following Somers' departure in late 1981, Jenilee Harrison joined the cast asCindy Snow, who was soon replaced byPriscilla Barnes as Terri Alden. After Norman Fell and Audra Lindley left the series for their own sitcom, Don Knotts joined the cast as the roommates' new landlord Ralph Furley.