This episode features the first appearance of the 'sink periscope' and the photo of Hitler with a microphone planted in it (for listening on their coffee pot.)
Schultz sees many aspects of the prisoners' plans, including Newkirk in a Gestapo uniform, the tank's special hiding place, and the female allied agent.
This is the first episode filmed and broadcast in color.
The end credits now display the familiar airman's cap and German helmet.
In and from this episode forward, the camp is called "Stalag 13," different from the pilot, where it was called "Camp 13."
In this episode only, the "Coffee Pot" was to listen in on Klink's telephone, not the listening bug with obvious microphone in the Hitler photo in Klink's office. Hogan explains to Carter ... "This is our phone tap, when the red light goes on Klink's office is phoning outside..."
Colonel Hogan tells the informer that the German delivery truck does not have dogs but in reality a recording of barking dogs, Hogan then underlines his remark by saying, "The record is in stereo so it's very convincing" This is a anachronism because stereo recordings did not become commercially available until the early 1950s.
Hogan's first kiss in the series is with Helga at her desk, just outside of Col Klink's office. While it is only a small peck on the lips now, later in the series they become longer and in different areas (such as Klink's car).
The first character to speak is Sgt. Hans Schultz, when his is counting the prisoners. The first word spoken is "eins" (German for one). The first spoken English words are "Oh, Schultz," as Newkirk falls into the arms of Sgt. Schultz.
The first character and German seen in the series is Sgt. Hans Schultz. Following him is Cpl. Louis LeBeau as the first hero seen.
This episode was shot in black and white, in contrast with the rest of the series, which was shot in color.