Anyone remember "Danger Man" starring Patrick McGoohan?
That's where allegedly the story of the Prisoner came from as Patrick McGoohan was stuck in a long contract unable to leave the show - Roger Moore was in the same boat in The Saint - hence his late arrival as James Bond..... - they both signed up for years in each show Danger Man & The Saint ...... Mcgoohan in particular felt he had been tricked, & felt like a prisoner to the show, signing a blind contract !