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Lockwood attended UCLA.
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Gary's most recent film appearance was in The Departed (2006), starring with Jack Nicholson, Leonardo DiCaprio, and Matt Damon.
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Gary appeared in TV movie The Ghost Of Flight 401 (1978) with Kim Basinger and Ernest Borgnine.
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Gary was to star in a movie in 1985 about Boston Marathon runner Dick Molen with himself in the lead and Kim Novak as the co-star, but troubles with producers and promoters shut the production down.
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Gary published a book about his experiences on 2001: A Space Odyssey (1968) in 2001 Memories: An Actor's Odyssey.
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Gary is 6 feet 2 inches tall.
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Gary worked as a stand-in for Anthony Perkins.
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Gary was a stuntman before acting full-time.