Goofs

Col. Klink's monocle is on the wrong eye in the fake newspaper. Typically, this indicates that the original negative used to create the picture was flipped during creation of the plates used to print the newspaper. When flipped in this way, viewing the image in a mirror restores the image to the correct orientation - in this case, Klink would have been facing to the left when the picture was taken.

When Erika comes down into the tunnel to warn Hogan about Major Hochstetter, she is wearing a scarf on her head. Sometimes the scarf is forward on her head, with the tail corner hanging loose. Sometimes the scarf is back further on her head, with the tail tucked into her coat collar.

The plane that was signaled to land was a 4-engine airplane. The one that landed and took off had 2 engines.

Hogan told Klink that General Weidler had been transferred to the Russian front. An American normally would not know this.

Update: Hogan says the general was recalled to the Russian front. Since the general and the whole story is made up, of course Hogan knows all about it. And Klink, as ever, is too stupid to question any of it.

The letter to Klink is not sealed, nor is there a postmark on it (to cancel the stamp) - even though Hogan told Newkirk to postmark the cancellation from Berlin. These two oddities should have caused Klink (even Klink) to question the veracity of the letter.

Update: Upon closer inspection, it appears that the letter does have a postmark, but it is very difficult to see. Still, a letter from Berlin that is not sealed would be questionable.

Update: Col. Klink has a secretary who likely receives all mail, and opens all letters. Thus, Klink would never suspect an unsealed envelope as being fake.

Update 2: The issue is that the letter was never sealed to begin with. A secretary would never have taken the time (nor would he/she have had the resources) to unseal a letter. The letter would have been opened using a letter opener, and it would have been slit along the top fold.

The phony newspaper that was created was in German, even though supposedly none of the prisoners knew German.

In the "dummy" newspaper, Col. Klink's first name (Wilhelm) is misspelled in both the headline and caption. It is spelled with a total of three "l's (the first part is spelled with two, as in "Will"). BTW, in earlier episodes, as well as the next one, the nameplate on Klink's office door is spelled correctly... "Wilhelm" (just two "l's" total).

In some scenes in Klink's office and private quarters, production lights are reflecting in Klink's monocle.

When Hogan, as an Abwher officer, holds up Hochstetter, he talks in a very light German accent, to the extent that you can tell that his voice is Hogan's. Hochstetter should have recognized it, even from behind a mask.

Hogan carries the letter to Klink hidden in his jacket. He had ordered Newkirk to postmark the letter as being from Berlin. When Hogan 'finds' it on Klink's desk, and Klink looks at it, the letter is not postmarked. Nor is it sealed. Hogan would never have allowed such oversights. Update: Upon closer inspection, it appears that the letter does have a postmark, but it is very difficult to see. Still, Hogan would not have 'delivered' the letter in an unsealed envelope.

Update: Update: Col. Klink has a secretary who likely receives all mail, and opens all letters. Thus, Klink would never suspect an unsealed envelope as being fake.

Update 2: The issue is that the letter was never sealed to begin with. A secretary would never have taken the time (nor would he/she have had the resources) to unseal a letter. The letter would have been opened using a letter opener, and it would have been slit along the top fold.