During the mid seventies, Marvel Comics toyed with the idea of producing a Prisoner comic strip, with Stan Lee eventually giving the job to artist, Jack Kirby.
Unfortunately, Stan Lee decided to cancel the project prior to publication. However Jack did produce a first instalment based on the first episode, 'Arrival', and although some of the artwork was not inked and had incomplete dialogue, temporarily pencilled in, it does give a flavour of what would have been the first Prisoner comic strip.
Further reading can be found at:
http://www.twomorrows.com/kirby/articles/11prisoner.html
http://www.forcesofgeek.com/2014/03/read-jack-kirbys-prisoner.html