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 Allan Arbus Maj. Sidney Freedman Guest Star Johnny Haymer Sgt. Zelmo Zale Guest Star Michael O'Keefe Tom Guest Star Peter Riegert Sgt. Zelmo Zale Guest Star