Goofs

The note Carter reads says come to Barracks 3. But later when LeBeau opens the barracks door to look out, a different building in the background has a sign on it identifying it as Barracks 3.

In at least 2 episodes prior to this (when Hogan gives Klink money to pay the Nazis and when Hogan shows the spy around camp), the Heroes are seen counterfeiting money. And yet none of them remember doing it for this episode.

When the gang goes into the building to 'put out the fire', there is a wide shot of Newkirk clearing one of the tables off. There is a cut to a closer shot of him at the table, but now there is a basket of papers that wasn't there in the wide shot. The other stuff on the table also moved back into the center of the table when it had been moved to one end during the wide shot.

The wire recording player has no pickup head. The horizontal spool the wire is wrapped around could not pick up the changes in the magnetic particles in the wire, as the pickup head needs to be stationary. When the moving wire passes over the stationary pickup head it induces changes to the magnetic field in the pickup head, which are amplified and fed to a speaker to reproduce the sound.

Hogan and the other prisoners would never have had real money (American, German or British) in their possession since ordinary money could aid them during escape attempts. Military personnel deployed in war were routinely paid in military scrip, which also prevented legal tender from circulating into the black market. The POWs held in countries that recognized the Geneva Conventions could work and be paid in camp scrip, but only use it within the camp, and only with the approval of camp authorities. However, German POW camps usually lacked goods for the prisoners to buy, so many Allied POWs in German captivity said that they had little use for their POW scrip.

Hogan and the rest of the prisoners could have real money that they got from the underground that they would have kept separate from any scrip or other money issued to them by the Germans, the Red Cross or others.

If the bills that Schultz passed during the poker game were indeed samples, as he told Hogan, they would have been counted and controlled until the operation began in earnest. Schultz would have been caught with the counterfeit bills before he could get to the poker game - or the missing samples would have been detected, and the camp searched for them, and Schultz (or the prisoners) would have been found with them.

All of the above may be true. But Schultz said that the box fell open and he grabbed a few of the bills. Likely, he closed the box and put it back. No one would have known or suspected that the bills were taken so Schultz would not have been searched and found with them.

In the opening scene, Hogan observes vehicles entering the Stalag using the periscope in the water barrel outside the barracks. However, the POV through the periscope is an overhead shot, while the scope is at barrel height.

During the introduction, as Newkirk is lowering the spigot/eyepiece of the periscope back in place, it is apparent that there is no connection from the connecting pipe to the barrel outside.

When Hogan and Kinch are editing their recording, when they finish there is some light shining through the tunnel behind LaBeau bringing in coffee, like light from the sun coming up, shining through a window. However they are in a tunnel.

When Carter shows the English 5-pound note to Col Hogan, it is a modern blue note. During the war, 5-pound notes were white.

In one scene where the Germans are attempting to counterfeit American paper money, the camera shows a close-up of the bill and it is dated Series 1963A, with the Henry Fowler signature as Secretary of the Treasury. Fowler became the Secretary of the Treasury in 1965.