Donald Henry Pleasence, OBE (; 5 October 1919 – 2 February 1995) was an English actor. His most notable film roles include psychiatrist Dr. Sam Loomis in Halloween and most of its sequels, the villain Ernst Stavro Blofeld in the James Bond film You Only Live Twice, RAF Flight Lieutenant Colin Blythe in The Great Escape, SEN 5241 in THX 1138, Clarence "Doc" Tydon in Wake in Fright, and the President of the United States in Escape from New York.