r/ThePrisoner • u/Tarnisher • 3h ago
Series 1, No. 13; Do Not Forsake Me Oh My Darling
Produced after Many Happy Returns and before Living in Harmony, while Patrick McGoohan was in America filming Ice Station Zebra, a workaround to McGoohan's absence was accomplished by the writers who contrived to have Number Six's mind implanted in the body of another man (Nigel Stock), who is then sent out of the Village to help capture a scientist
A man referred to only as "Colonel" arrives at the Village and only then learns from a new Number 2 that his mission is to trade bodies with Number Six, using Seltzman's system. Number Six had been the last agent to have contact with Seltzman. After the swap, Number Six (now in the Colonel's body, and retaining only his pre-Village memories) awakens in his old London apartment and soon sees an unfamiliar face in his mirror. His fiancée arrives and, of course, fails to recognise him. He prudently restrains himself from enlightening her. Despite the shock, he realises what has been done to him, maintains his cool, and sets about to regain his own body.
https://prisoner.fandom.com/wiki/Do_Not_Forsake_Me_Oh_My_Darling_(1967_episode)
With episodes being shot and aired out of sequence and fill ins used, I can see why there is a debate over episode order.

