"Hammer into Anvil" is an episode of the allegorical British science fiction TV series, The Prisoner. It was written by Roger Woddis and directed by Pat Jackson and twelfth produced. It was the tenth episode to be broadcast in the UK on ITV (ATV Midlands and Grampian) on Friday 1 December 1967 and first aired in the United States on CBS on Saturday 31 August 1968. The episode stars Patrick McGoohan as Number Six and features as Number Two Patrick Cargill. The central themes of this episode are insecurity, paranoia, and conspiracy thinking in a leader.