His best known films include "Wait Until Dark" as the erudite killer stalking Audrey Hepburn; "The Russians Are Coming, the Russians Are Coming" as the leader of the landing party from the stranded Soviet submarine, "The Heart Is a Lonely Hunter," "Catch-22," as Yossarian, "The Seven-Per-Cent Solution," "Little Murders," "The In-Laws," "Glengarry Glen Ross", and "Little Miss Sunshine", for which he won a Best Supporting Actor Oscar; and "Argo". His portrayal of Dr. Oatman, a psychiatrist treating John Cusack's hit man character in "Grosse Point Blank" was also well received.