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William Atherton Knight (born July 30, 1947) is an American actor, best known for portraying Richard Thornburg in Die Hard and its sequel and Walter Peck in Ghostbusters.
During the 1990s, Aykroyd wrote a script for a potential third film in the series. The concept reportedly would have the characters transported to an alternate version of Manhattan called Manhellton, where the people and places are hellish versions of their originals and they meet the devil.