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In addition to his work in film, Trevor was also a highly acclaimed stage and television actor. He made his Broadway debut in 1951 and went on to star in numerous plays, including "The Glass Menagerie," "A Streetcar Named Desire," and "Cat on a Hot Tin Roof." He also appeared in a number of television shows, including "The Twilight Zone," "The Alfred Hitchcock Hour," and "The Carol Burnett Show."