Part action series, part psychedelic fantasy, part allegory, Patrick McGoohan's masterpiece, The Prisoner, was initially touted as a sequel to his earlier spy series, Danger Man. But when it was first broadcast in 1967 TV audiences were puzzled; when the show was cancelled 17 episodes later due to declining viewing figures, no one was any the wiser. Shot in the picturesque surroundings of Portmeirion in North Wales, whose architectural fantasies provided an ideal backdrop for the show's surrealism, The Prisoner has subsequently been recognised as one of the most innovative and thought-provoking series ever to be broadcast. Despite the primary-coloured flower-power look, the show's bold ideas haven't dated at all, proving that The Prisoner was simply years ahead of its time.