The Prisoner has been interpreted as a sequel to
Danger Man, but it's neither confirmed nor denied in the series if Number Six is John Drake. However you decide to fall on the issue,
The Prisoner is such a departure in style and tone from McGoohan's previous series that I would advise against viewing the series as a follow-up in any conventional sense. At times surreal, psychedelic, and totally paranoid,
The Prisoner is rather unlike any other television series ever made.