Dwayne Hickman Dobie Gillis Actor Bob Denver Maynard G. Krebs Actor Yvonne Lime Melissa Frome Actor Tuesday Weld Thalia Menninger Actor Jean Byron Mrs. Ruth Adams, Dr. Burkhart Actor Warren Beatty Milton Armitage Actor Sheila Kuehl Zelda Gilroy Actor Tommy Farrell Riff Ryan Actor William Schallert Mr. Leander Pomfritt Actor Angelo De Meo Guest Star Ray Hemphill Guest Star James Yagi Guest Star Michael J. Pollard Guest Star Rod Amateau Producer Fred S. Fox Writer Izzy Elinson Writer