This was one of the programs that Bobby Rupp and murder victims Herbert, Nancy and Kenyon Clutter watched the evening that they were killed by Richard Eugene Hickcok and Perry Edward Smith (November 15th, 1959). Bobby Rupp was Nancy Clutter's boyfriend and went home before the killers arrived. (This was the notorious murder written about by Truman Capote's in his book (and subsequent movie) In Cold Blood.)
Several episodes of this series were released theatrically by 20th Century Fox in the UK as supporting films.
The two leads, Luciana Paluzzi and David Hedison, are connected to another espionage character, through the James Bond franchise: Paluzzi would play James Bond's nemesis, Spectre operative Fiona Volpe, in Thunderball (1965) and Hedison would play James Bond's closest ally, CIA agent Felix Leiter, in Live and Let Die (1973) and Licence to Kill (1989).