of Number Six and those around him. Later, Six asks the town band to play the Farandole from the same Bizet piece, and when the band starts playing, he promptly leaves so that he is not around to hear it. He leaves a fake message in a dead drop that is from a deceased person, wishing him a happy birthday. Number Two becomes increasingly agitated, wishing he could get away with killing Number Six. Number Fourteen offers to do so, making it appear an accident, and challenges Number Six to a game of "kosho" – a Japanese, trampoline-based contact sport – but is unable to "accidentally" drown his opponent. Number Six leaves a cuckoo clock in front of Number Two's door, causing him to panic and summon a bomb squad. Six captures a pigeon, attaches a message to its leg and sets it free in the woods. The bird is intercepted by Number 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. Later, Number Six is able to trick Number Two into believing that Number Fourteen is conspiring against him. When the other keepers of the village cannot discern the hidden meaning in Number Six's messages, Number Two suspects everyone working for him of being part of a conspiracy. Number Fourteen fights with Number Six, who throws him out of a window. In the end, Number Six confronts an unnerved and agitated Number Two, who expresses the belief that Number Six is really "D-6", a man sent by "XO4" to test his security. Feeding on Number Two's paranoia, Number Six charges Number Two with treason: if Number Two's belief was true, then he would be duty-bound not to interfere. At Number Six's suggestion, Number Two calls the hotline to Number One to report his own failures and ask that he be replaced. Cast Patrick Cargill . . . Number Two Victor Maddern . . . Band Master Basil Hoskins . . . Number Fourteen Norman Scace . . . Psychiatric director Derek Aylward . . . New supervisor Hilary Dwyer . . . Number Seventy-Three Arthur Gross . . . Control room supervisor Peter Swanwick . . . Supervisor Victor Woolf . .