In the last episode, 6, 2, the butler, and Alexis Kanner somehow drove away in a semi and then parted ways from what I remember.
I googled Patrick McGoohan. Very interesting cinema career both before & after The Prisoner of which he was co-author.
The 1967 depictions of all-seeing surveillance were well ahead of their time.
But it all started with George Orwell in “1984”.