Alan Alda Capt. Benjamin Franklin "Hawkeye" Pierce Actor McLean Stevenson Lt. Col. Henry Blake Actor Wayne Rogers Capt. John McIntyre Actor Jamie Farr Cpl. Maxwell Klinger Actor Gary Burghoff Cpl. Walter "Radar" O'Reilly Actor Loretta Swit Maj. Margaret Houlihan Actor Larry Linville Maj. Frank Burns Actor William Christopher Father Francis Mulcahy Actor Harry Morgan Col. Sherman Potter Guest Star Lynnette Mettey Nurse Baker Guest Star Teddy Wilson Warrent Officer Martin 'Marty' Williams Guest Star Brad Trumbull Colonel Atkins Guest Star Dennis Erdman Harrison Guest Star