"Hammer into Anvil" is an episode of the allegorical British science fiction TV series The Prisoner.

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.

He takes six copies of the same record of Bizet's L'Arlésienne suite at the music store and plays them, eyeing his watch.

He leaves a message to be read on the radio, wishing himself a happy birthday, with the sender listed as the deceased Number 113.

Fourteen offers to do so, making it appear an accident, and challenges Six to a game of "kosho" – a Japanese, trampoline-based contact sport – but is unable to "accidentally" drown his opponent.

Six leaves a cuckoo clock in front of Two's door, causing him to panic and summon a bomb squad.

The bird is intercepted by Two's forces, and Two sees that the message states that Six will send a visual signal the next morning.

Six goes to the beach and sends a visual signal (in light-flash Morse code) – a nursery rhyme with no apparent hidden meaning, all witnessed by Two.