At one point near the start of the show, Carter is seen with his hair closely shaven. This is because shortly before this scene was filmed, Larry Hovis made a guest appearance as a Marine on Gomer Pyle, USMC. This show was also on CBS, and the outside scenes were filmed in the same back lot as Hogan's Heroes, about 500 feet away from the Hogan's Heroes set.
Sergeant Schmidt, played by Bard Stevens, has a speaking role, but is not identified by name in the show. He is the Gestapo escort for the new prisoner.
Flood is brought in in a car with license plate number WH 65047. The truck that accompanied him has the license plate number WH 39495.
Some databases list the title of this episode as 'The Most Escape-Proof Prison Camp I've Ever Escaped From'.