John Ritter Jack Tripper Actor Joyce DeWitt Janet Wood Actor Suzanne Somers Chrissy Snow Actor Ann Wedgeworth Lana Shields Actor Richard Kline Larry Dallas Actor Don Knotts Ralph Furley Actor Paul Ainsley Guest Star Don Nicholl Executive Producer Michael Ross Executive Producer Bernie West Executive Producer Bill Richmond Producer Gene Perret Producer Dave Powers Director Kim Weiskopf Writer Michael Baser Writer