John Ritter Jack Tripper Actor Joyce DeWitt Janet Wood Actor Suzanne Somers Chrissy Snow Actor Audra Lindley Helen Roper Actor Norman Fell Stanley Roper Actor William Pierson Guest Star Priscilla Morrill Guest Star Christina Hart Guest Star Richard Kline Larry Dallas Actor Peter Palmer Guest Star Kit McDonough Guest Star Lou Wills Jr. Guest Star Peter Schuck Guest Star Joey Forman Guest Star Karen Fredrik Guest Star Shera Danese Guest Star Paul Ainsley Guest Star Don Nicholl Producer, Writer Michael Ross Producer, Writer Bernie West Producer, Writer Bill Hobin Director Paul Wayne Writer Dennis Koenig Writer George Burditt Writer Larry Balmagia Writer