The "DF box" in the Allied plane that crashes just outside of Stalag 13, which homed in on signals from two clandestine radio stations (providing a navigational fix where the beams cross) is similar in its operational details to a radio navigation system known as Knickebein ("crooked leg"), used by the Luftwaffe for guiding night bombing raids during the early phases of the Battle of Britain.
British-born actor Ben Wright, here portraying a Nazi major in one of several guest appearances in different roles on Hogan's Heroes (1965), is perhaps most recognizable for his portrayal of Austrian Nazi official (Gauleiter) Herr Zeller in The Sound of Music (1965).
In listing possible casino games, Klink wistfully mentions 'chemin de fer'. That is the French version of Italian baccarat, making it a cousin to blackjack.
Colonel Hogan (Bob Crane) refers to the camp casino as Monte Carlo. This alludes to the Monte Carlo Casino, officially named Casino de Monte-Carlo, a gambling and entertainment complex located in Monaco, a principality in Europe which was famous for gambling since the late 1850s.
Noam Pitlik, who plays Capt. Mitchell, also played Wagner, the German soldier who infiltrated the Heroes' operation in the pilot episode, "The Informer."