"A. B. and C." is the title of the third episode of the 1967-68 British science fiction-allegorical series, The Prisoner. It originally aired in the UK on ITV on 13 October 1967 and was first broadcast in the United States on CBS on 22 June 1968. The episode stars Patrick McGoohan in the character of Number 6 and features as Number 2 Colin Gordon - the only actor other than Leo McKern who would play Number 2 in more than one episode.