The episode opens with an uncommon shot of the London skyline and the word "LONDON" superimposed upon it.
A pack of Benson and Hedges cigarettes is superimposed over some of the closing credits.
Newkirk, (Richard Dawson), does not appear in this episode. Olsen (Stewart Moss), fills in during this episode and a handful of others. It is likely due to his resemblance to Hogan and other skills, making him a valued 6th man, yet he's just not made a series regular.
Carla is played by Angela Dorian, whose real name is Victoria Vetri. She was Playboy Magazine's Playmate of the Month for September 1967, and later Playmate of the Year for 1968.
No audience laughter is present in this episode.
Carter impersonates Herr Schmidt of the Gestapo.
The prisoners "play" a knitted sock in a fake sewing machine to decode a secret message from London.
There is an obvious sound edit as Newkirk praises his skill after cracking Klink's safe combination.
There is no audience laughter present in this episode.
A pack of Benson & Hedges 100's is superimposed over much of the closing credits, though it does not appear in the DVD version.
This was the third episode in a row (in production order) that Larry Hovis did not appear. He would appear in the next filmed episode "The Swing Shift" which CBS had already broadcast.
The entrance fee for the prisoners' proposed jitterbug contest is two cigarettes, and first prize is one pound of coffee.
Kurtz's nickname for Burkhalter is Hansie, although the latter's first name is Albert.
Klink's office uncharacteristically displays a Nazi flag in this episode. It is placed between his heater and closet.
Hogan impersonates Gestapo Major Hoganschmidt.
Carter impersonates Gestapo Corporal Schindler.
At the SS ammunition depot is a sign reading HOCHE SPRENGGEFAHR, which is supposed to mean "high risk of explosion". But the correct spelling should be HOHE instead of HOCHE, as the German adjective "hoch" is irregular.
Hogan impersonates Herr Bihler, president of a fictitious company (Bihler Brothers,) and Newkirk impersonates Fritz.
After berating Hogan throughout the episode, General Barton demands Hogan's attention in order to salute him. This is an extremely high honor: ranking officers nearly never begin the saluting ritual.
The Hogan's Heroes VHS collection's "Generally Speaking" recording incorrectly states that Sergeant Kinchloe impersonates Winston Churchill in this episode. In fact, Peter Newkirk (Richard Dawson) does the voice of "Old Winnie."