Trivia: This episode was not shown in the initial U.S. airing of "The Prisoner" on CBS. There was speculation that its pacifist, anti-violence moral might have been construed as a Vietnam War protest, but the network's reason for censoring the episode has never been disclosed.
Trivia: The bizarrely existential ending of the series, which answered none of the questions posed by earlier episodes (but rather seemed to say, "The answer is there is no answer!") upset viewers so much that Patrick McGoohan says he was forced to go into hiding. His phone had been ringing constantly and people who'd found his address were banging on his door to complain.
Free for All - S1-E4
Trivia: This episode's writing credit reads "Paddy Fitz." This was one of many pseudonyms Patrick McGoohan used in writing, directing and producing most of the series himself. "Fitz" was borrowed from his mother's maiden name, Fitzpatrick.
The Girl Who Was Death - S1-E15
Trivia: Several of the street signs in the Witchwood sequence bear the names of the series producers (David Tomblin, for example) and other crew members.
Answer: It's even more obvious than you think, you know who number 1 is in the very first episode. When 2 replies to the question "who is #1?" Change the way he answers from you are number one (in the monotone or accented answer to, "You are, number 6. The comma gives you the answer. #6 is #1. It's the tone of the answer.