"The Chimes of Big Ben" is an episode of the British science fiction-allegorical series, The Prisoner. It originally aired in the UK on ITV on 6 October 1967 and was first broadcast in the United States on CBS on 8 June 1968.The episode starred Patrick McGoohan in the character of Number Six and introduced perhaps the most popular of the many characters who would bear the title of "Number Two" in the series, that of Leo McKern.