Dennis Weaver learned he had been elected President of the Screen Actors Guild while filming this episode.
Martha Hyer's last acting performance.
Richard Denning, who plays Edgar Hamilton, at that time he was well known for playing the Governor of Hawaii in the TV show Hawaii Five-O. As he was already a resident of Hawaii, he was cheaper to hire than anyone else, since there would be no additional cost of paying his transportation from the mainland or hotel expenses.
When McCloud is seen driving a cart at JFK Airport (actually footage re-purposed from Our Man in Paris (1970)), there is an announcement calling Mr. and Mrs Larsen to a white courtesy telephone. This is a reference to executive producer Glen A. Larson.