Creator Backlash: Writer Vincent Tilsley claimed that the episode went from a not very good script into a very different not very good script.
Development Gag: Seltzman's old address in Scotland—from the old letter Number Six sent him—showed that he lived on "Portmeirion Road." This was named after Hotel Portmeiron, the Real Life filming location for scenes of The Village.
This episode was the first of the second production block, and the basic concept - No. 6 being sent away to undertake a mission for the Village - was a dry-run for a possible format change had the series continued; reportedly, the proposal was for Six to act as a reluctant agent for the Village. The mind-transfer device may have been introduced as a way of doing this without Patrick McGoohan.
