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In page Lawrence Dobkin:

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Dobkin's notable supporting film roles include Twelve O'Clock High (1949), The Day the Earth Stood Still (1951), Julius Caesar (1953), The Ten Commandments (1956), The Defiant Ones (1958), Johnny Yuma (1966) and Patton (1970). He had a cameo appearance in the 1954 sci-fi thriller Them. In an uncredited performance in Alfred Hitchcock's North by Northwest, Dobkin has a memorable line as an intelligence official who remarks on the plight of the hapless protagonist, on the run for murder after being mistaken for a person who doesn't exist: "It's so horribly sad. Why is it I feel like laughing?"[citation needed]