Also known as "Church of the Poison Mind."
Inspired by the TV series 'The Prisoner'.
The song that Lupin plays on the pipe organ is commonly known in Germany as the Flea Waltz.
In the Japanese original, when the Rover-like bubble carries Lupin and his brainwashed friends back to Gemarschaft, Lupin's mouth moves but he doesn't say anything. The English dub fixes this by having Lupin snoring gently as he's passed out from the shock of the bubble's impact.
The last episode to air before the release of the franchise's first feature film, 'The Mystery of Mamo'.