Thirteenth broadcast episode of The Prisoner, where Number Six gets a new body

Reference

Do Not Forsake Me Oh My Darling - Wikipedia, the free encyclopedia
"'Do Not Forsake Me Oh My Darling' is the thirteenth episode of the television series The Prisoner, produced while Patrick McGoohan was in America filming Ice Station Zebra. As a workaround to McGoohan's absence the writers 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. As a result, McGoohan appears in the episode for only a couple of minutes. ..."