Part 5 of "Fall Out", which closes out the episode, and the series.
In some regards, the consternation and anger stirred up by this episode's climactic meeting between No. 6 and No. 1, along with "The Prisoner"'s open end, was quite similar to that caused by the rather enigmatic, open end of the "Sopranos", and the audience reaction to the latter made me think of the reactions to this series' end when I first heard about it.
Will have more thoughts, reflections and pontifications on "The Prisoner" in this space in a few days time.
In the meantime, be seeing you, as was said all throughout the series.