John McIntire and Jeanette Nolan play the good, married couple Clay and Holly Grainger. Fifteen years later they would play the evil, married couple George and Eunice MacCready in the 1984 film, "Cloak & Dagger."
Alan Hale's character is named Sgt. O'Rourke. Perhaps not coincidentally, this was also the name of Forrest Tucker's character on "F Troop," which had been cancelled two years earlier and was rerunning in syndication when this episode was first broadcast.
John McIntire and Michael Burns previously co-starred on the long-running series "Wagon Train".