In THE PRISONER, a fellow (that may or may not be a former British intelligence agent, the hero from "Danger Man/Secret Agent") is kidnapped. When he awakens, he finds himself on an island, trapped in/by a regimented Orwellian society where individuality and privacy do not exist. The "keepers" of this society - the Village - seek to "break" this fellow they've labelled "#6"(via mind-warping scientific means and psychological torture), as he refuses to "accept" his situation and acquiesce to the Village.
In NOWHERE MAN, it is the opposite: Thomas Veil is having dinner -- he goes to the restroom. When he returns, his life is gone. NO ONE seems to know him, his bank-card doesn't work, all traces of his identity have been WIPED AWAY. (Even his mother doesn't know him!) Veil is, not coincidentally, a photographer -- he took a photograph of an execution in a Central (or South) American jungle. The unnamed Forces At Work WANT the negative to this photo. Veil goes on the run, alternating between being the quarry of the conspiracy and hunting the conspirators, who, btw, have designs on making the USA just like the Village in The Prisoner.
Like The Prisoner, it is a tense, creepy, paranoid, at times nightmarish drama -- as with the former, "Nowhere Man"'s Veil manages to thwart the conspiracy yet cannot seem to get his life "back." And there are REFERENCES to "The Prisoner" -- at one point, a character answers a question, "That would be telling." Veil, like the Prisoner's #6, uses the fear many of the conspirators have of their superiors -- as in the Village, the Pullers of Strings are seriously intolerant of failure. (In nearly every episode of Prisoner, there is a "new" #2, as in the previous ep, a #2 fails to "break" #6. Do the math.) So, we get to see the "vulnerable" prey toying/mind****ing the powerful conspiracy...and the conspiracy playing with the minds and lives of...well, you got to watch. If you like The Prisoner or "conspiracy"-type dramas (i.e., "24," "Spooks" -- with echoes of "The Outer Limits"), SEE Nowhere Man.