Alan Alda Capt. Benjamin Franklin "Hawkeye" Pierce Actor Harry Morgan Col. Sherman Potter Actor David Ogden Stiers Maj. Charles Emerson Winchester III Actor Mike Farrell Capt. B.J. Hunnicut Actor Gary Burghoff Cpl. Walter "Radar" O'Reilly Actor Loretta Swit Maj. Margaret Houlihan Actor Jamie Farr Cpl. Maxwell Klinger Actor William Christopher Father Francis Mulcahy Actor Marilyn Jones Lt. Patty Haven Guest Star Johnny Haymer Sgt. Zelmo Zale Guest Star Michael O'Dwyer Olsen Guest Star Richard Lee-Sung Driver Guest Star Tony Cristino Sergeant LaGrow Guest Star Arell Blanton Private Hough Guest Star Jon St.Elwood Private Reuss Guest Star