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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.
Twenty four years after events of the 1964 All Valley Karate Tournament, a down-and-out Johnny Lawrence seeks redemption by reopening the infamous Cobra Kai dojo, reigniting his rivalry with a now successful Daniel LaRusso.