John Ritter Jack Tripper Actor Joyce DeWitt Janet Wood Actor Jenilee Harrison Cindy Snow Actor Suzanne Somers Chrissy Snow Actor Richard Kline Larry Dallas Actor Don Knotts Ralph Furley Actor Vernon Weddle Guest Star Jan Sterling Guest Star Hamilton Camp Guest Star Mickey Deems Guest Star Ellen Travolta Guest Star Michael Lombard Guest Star Gino Conforti Guest Star Shauna Sullivan Guest Star Brad Blaisdell Guest Star Sondra Currie Guest Star Edmund Stoiber Guest Star Jillian Kesner Guest Star Jordan Clarke Guest Star David Tress Guest Star Michael Ross Executive Producer Bernie West Executive Producer Budd Grossman Executive Producer, Writer George Burditt Producer, Writer George Sunga Producer Dave Powers Director Martin Rips Writer Michael Baser Writer Mark Tuttle Writer Tom Dunsmuir Writer Joseph Staretski Writer Kim Weiskopf Writer