Peeping Tom is a 1960 British thriller film directed by Michael Powell and written by the World War II cryptographer and polymath Leo Marks. The title derives from the slang expression 'peeping Tom' describing a voyeur. The film revolves around a serial killer who murders women while using a portable movie camera to record their dying expressions of terror. The film's controversial subject and the extremely harsh reception by critics effectively destroyed Powell's career as a director in the United Kingdom. However, it attracted a cult following, and in later years, it has been re-evaluated and is now considered a masterpiece. The music score, written by Brian Easdale, contains a challenging part for solo piano, which was played by the Australian virtuoso Gordon Watson.