These early black and white episodes of the Saint were some of the best. The author of the books and stories, Leslie Charteris, was more closely involved with the early programs than the later ones. In season three I particularly noticed some similarity with both the Avengers and James Bond. For instance in episode 3, JEANNINE, the lady makes coffee. Simon sips and says, "MMM, Blue Mountain, lightly roasted, coarsely ground." The lady replies, "Instant, two francs a tin." Unfazed, the Saint merely replies, "You can't win them all."
As another reviewer noted, The Saint was Roger Moore at his best. The series made him a star. Seasons 1 - 3 are currently free with Amazon Prime.