Be seeing you ...
I was fortunate to live in Canada where our CBC often picked up the best of BBC programs years ahead of the U.S. I'm not certain but if we didn't get the Prisoner first-run in 67, it was as a rerun in the summer.
The Prisoner was yet another example of the free-thinking, society-changing, barrier -smashing type of creative entertainment coming out of Britain (and around the Western world) in the 60s following the massive Beatles explosion earlier in the decade. All rigid norms were dismissed. In that spirit, The Prisoner mirrored a young and up-and-comming Boomer generation's desire for an end of deference to officialdom. Don't follow leaders. Beware of parking meters.