* CaliforniaDoubling: Averted for the most part; the series was well known for shooting on location throughout the U.S. whenever possible. One episode was even shot outside the U.S. -- season 4's "A Long Way From St. Louie" was set and shot in Toronto.
* DistancedFromCurrentEvents: The episode "I'm Here to Kill a King", which deals with a political assassin, was originally scheduled to air on November 29, 1963. After the real-life assassination of President UsefulNotes/JohnFKennedy one week earlier, Creator/{{CBS}} pulled the episode from its schedule, and it was not seen until the show went into syndication.

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