When Klink makes the call to Hilda to send Roberts in to meet Baumann, there are two pictures and an ink blotter on Klink's desk, in the corner. Those items are moved around when there is a cut to a new angle showing Roberts entering the room. Note: The positions they were in when Klink made the call would have been a problem for the film editors/cutters when they put the two films together to have Roberts and Baumann in the same frame, thus the need to move them.
When Roberts leaves the cooler through the tunnel, he puts his cap on, but leaves his white scarf. When he emerges from the tree stump, his scarf is on under his overcoat.
The time element doesn't work. During the time the fake Group Captain is captured and returned to the cooler, the real Group Captain gets in the car, gets to the airport, and flies off to England. Then this is reported to Major Hochsteter by phone and he says the group captain took off five minutes ago. No way does the real Group Captain do all that in just a few minutes.
UPDATE: This is not a goof. The description above is incorrect. First, the group captain (real or fake) was to fly from near Stalag 13 to the Belgian coast, and from there he was to take a boat across the Channel to England. Second, both group captains' escapes were made the night before. Hochstetter's comment was made several hours after that (in daylight), meaning the fake one who was caught spent the night in the cooler.
UPDATE: This is not a goof. The description above is incorrect. First, the group captain (real or fake) was to fly from near Stalag 13 to the Belgian coast, and from there he was to take a boat across the Channel to England. Second, both group captains' escapes were made the night before. Hochstetter's comment was made several hours after that (in daylight), meaning the fake one who was caught spent the night in the cooler.
At the episode's end, when Klink's cap is shot off his head, there should be two bullet holes - one entry and one exit. There is only one hole.
UPDATE: This is not a goof. There should be only one hole. Baumann's hand flies up, knocks Klink's cap upward, the wrist gun fires, and the bullet passes through one location on the cap. The "entry" hole and the "exit" hole are one and the same. When the cap is knocked upward, the bullet passes through the cap from inside to outside, creating only one hole.
UPDATE: This is not a goof. There should be only one hole. Baumann's hand flies up, knocks Klink's cap upward, the wrist gun fires, and the bullet passes through one location on the cap. The "entry" hole and the "exit" hole are one and the same. When the cap is knocked upward, the bullet passes through the cap from inside to outside, creating only one hole.
When Group Captain Roberts tells the Gestapo guard at the car to speak English, the guard says 'Yes, sir' is an American accent.
UPDATE: This is not a goof if the guard was part of the same infiltration group as Leutnant Baumann. He would be trained not only to speak English, but to speak it without a German accent. During the Battle of the Bulge, Operation Greif trained German soldiers to pose as Allied soldiers and sow confusion behind Allied lines. They had to be convincing to do so.
UPDATE: This is not a goof if the guard was part of the same infiltration group as Leutnant Baumann. He would be trained not only to speak English, but to speak it without a German accent. During the Battle of the Bulge, Operation Greif trained German soldiers to pose as Allied soldiers and sow confusion behind Allied lines. They had to be convincing to do so.
When Schulz takes a basketball shot which goes into the water tower, the frame freezes for approximately three seconds when the scene changes.
During the introduction, a car carrying Hochstetter and Roberts drives in through the main gate. There are already tracks on the ground visible when the car drives in, indicating this is a second take.
As the prisoners play basketball, and Newkirk and Carter converse, two palm trees are visible in the left background in "Germany".
The reference to the British Prime Minister as "Sir" Winston is premature by as much as a decade. Churchill was invested as a Knight of the Garter on 14 June 1954 during his second premiership. He had been offered a spot in the elite organization when an opening appeared at war's end, but after the July 1945 parliamentary elections which brought Clement Atlee and a Labour government, Churchill declined King George VI's offer by saying that the British people had given him the "order of the boot."
When the gang gets the real Roberts out of the cooler, the tunnel entrance to the cell is under a sink. However, none of the plumbing is connected (the drain is actually plugged); therefore, the sink would be inoperable. Unless prisoners in the cell were specifically told not to use the sink, the situation would be noticed, and the guards notified. Subsequent checking of the sink would immediately lead to the tunnel system, unraveling the entire operation.
When Col. Klink, Maj. Hochstetter, and Lt. Baumann discuss the details of the mission, Klink asks, "And when does the Major leave?" But neither Lt. Baumann nor Gp. Capt. Roberts - the British officer whom Baumann is supposed to impersonate - is even close to a Major. A British Group Captain is two grades above a Major, and a German Leutnant is four grades below a Major.