Alas, the obscure references to "Be Seeing You", Number Six, Number One have dated us.
In the middle of the 20th century, during height of the Cold War, there emerged a number of television series about spies and their lives. Among the best were two British series. The first was called "Secret Agent", and the second called "The Prisoner". Both starred the extraordinary Patrick McGoohan. You might know the former from its catchy theme song by Johnny Rivers, listen here
The second series implied that McGoohan's character had tried to leave the spy biz and was interned at a camp for such people (hence the title "The Prisoner"). His name was indeed "taken away" and he was referred to only as Number Six, engaged in a game of wits with a series of Number Twos, and always asking the question "Who is Number One?"
This was Brit TV at its best in that era.
Be seeing you...