here and here.
In The Prisoner episode, "A, B and C," No 2 observes No 6's dreams on a screen and manipulates the dreams. This is like the para-reality programming. In the episode, "Do Not Forsake Me, Oh My Darling," the Village puts No 6's mind into another body.
In Neil Gaiman's Miracleman, the Qys (alien) called "Mors" (Latin for "death") asks Warhol no 6 to befriend Gargunza no 6 who is a prisoner but tries to escape after six months - also after Mors has given him a pomegranate, a mythological reference.
Also, former spies are subjected to para-reality programming and confined in "the City," of which Evelyn Cream says that he is its Number One. When No 1860 is allowed out into the real world, she wonders whether there is a realer world beyond it and feels that she is still being watched, just as No 6 realizes that he is not free from his enemies even when he is back in London.