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The Grand Knockout Tournament (also known as It's a Royal Knockout) was a one-off charity event which took place on 15 June 1987, and was shown on British television on 19 June 1987 (BBC1, repeated on 27 December 1987), in addition to airing on American TV via the USA Network on 12 August 1987, and European satellite channel Superchannel on 6 March 1988 (repeated on Christmas Day 1988). imdb.com