Some of Their Planes Are Missing - S3-E2
Visible crew/equipment: When LeBeau, Carter and Schultz enter the visiting Germans' quarters, when the door is open you can see the sound stage floorboards are uneven in front of the door to the neighbouring barracks.
Some of Their Planes Are Missing - S3-E2
Continuity mistake: Though six planes were supposed to be destroyed, only two were visible or bombed. At the fade out, the two planes blowing up were a reversed, re-used shot.
Some of Their Planes Are Missing - S3-E2
Continuity mistake: After getting out of the tunnel, Hogan, Carter, and Le Beau are in a truck travelling to the meeting. Hogan in in the right seat, Carter on the left. But as the pull up to the meeting, they have switched sides, Hogan on the left and Carter on the right.
Some of Their Planes Are Missing - S3-E2
Continuity mistake: In the tunnel, Le Beau picks up some darts and tosses one with green feathers at the target. When the camera looks at the target (a picture of Hitler) a blue winged dart hits the board.
Some of Their Planes Are Missing - S3-E2
Other mistake: While Carter starts shining boots, the disturbed stage flooring can be seen in front of the opposite building; the joint between the panels is markedly raised.
Some of Their Planes Are Missing - S3-E2
Continuity mistake: As the boys trade candy bars and Schultz reaches in, Hogan stops everything and his left hand is up with a bar in it, his right hand empty. A second later, his left is down, and the bar has jumped to his right hand.
Factual error: While the show always made it winter time by having snow on everything (salt piles strewn about) and icicles on all the windows, this episode has an actual date of occurrence, June 6, 1944. They help to solve the snow on the set by taping the whole episode inside. However, the windows still all have the ice formations on them. It's late spring.
Factual error: The motorcycle courier coming in wears sunglasses that are definitely newer than 1942. Sunglasses with domed, wrap-around lenses were not invented in the 1940s.
Sergeant Schultz Meets Mata Hari - S3-E4
Audio problem: You hear Carter ask, "Hey, what are you doing with my mattress?" as the Gestapo searches the barracks, but his mouth doesn't move.
Sergeant Schultz Meets Mata Hari - S3-E4
Other mistake: As the lady Gestapo spy comes into the beer hall, Schultz not only has a matchbook in hand, but keeps looking at the action between the bartender and the lady, waiting for his entrance cue.
Funny Thing Happened on the Way to London - S3-E5
Plot hole: When the driver of the car addresses Roberts (the real Roberts that is, not the double), Roberts reprimands him, telling him not to call him Baumann. It is safe to assume the guard was supposed to be speaking German, since he addressed Roberts by his German identity. That poses some interesting questions. Did Roberts speak English? In those days, most Germans did not even have a basic knowledge of the English language. Did he speak German? That would imply he has a good enough command of the German language to pass as a German. Roberts however isn't a spy like Hogan and his crew, but a pilot in the RAF.
Funny Thing Happened on the Way to London - S3-E5
Other mistake: When Lieutenant Bauman starts speaking German, his last two words "especial mission" is said in a decidedly French accent. The correct German phrase would be "Sonderauftrag." Non-German terms like "Mission" were generally avoided in the Wehrmacht for ideological reasons.
Funny Thing Happened on the Way to London - S3-E5
Revealing mistake: When the staff car enters the camp, you see a set of tire tracks leading up to, and stopping at, Klink's position. When the car comes in, it precisely follows the tracks, suggesting previous takes.
How to Win Friends and Influence Nazis - S3-E7
Deliberate mistake: Burkhalter pulls some papers out of his bags marked "Top Secret." Why would German papers be marked in English, so the prisoners know what not to look at?
How to Win Friends and Influence Nazis - S3-E7
Visible crew/equipment: When Hogan gets up in the hotel room they're all in, the shadow of the boom mic plays on the wall he heads toward.
How to Win Friends and Influence Nazis - S3-E7
Continuity mistake: In the long shot of the hotel room, the boys are lulling Schultz to get him to sleep. In the long shot, his right hand is holding the rifle. In the close up, it's barely draped over the rifle.
Nights in Shining Armor - S3-E8
Factual error: When the prisoners are in the workshop to "fix" the plumbing, sergeant Shultz is armed with a krag Jorgensen rifle. German soldiers were armed with the k98 mauser, not the krag.
Nights in Shining Armor - S3-E8
Other mistake: When Hogan shoots the vest, it stays still for a couple of seconds then swings in a way that is not normal.
Nights in Shining Armor - S3-E8
Other mistake: In Hogan's quarters, after Hogan reveals the two Aces up Newkirk's sleeve, Newkirk goes to brush his hair. As his hand goes up, you can see the cards in his hand.
Nights in Shining Armor - S3-E8
Other mistake: In the end, Schultz tests the faucets, and they work correctly. When Klink goes to touch the faucets, watch the drain. The high pressure jet of water comes from it just when Klink is over it.
Answer: Nimrod's actual identity was never revealed in the series. It was only known that he was a British intelligence agent. Nimrod was not Colonel Klink. Hogan had only implied it was him as a ruse to get Klink returned as camp commandant, not wanting him replaced by someone more competent who would impede the Heroes war activities. The term "nimrod" is also slang for a nerdy, doofus type of person, though it's unclear why that was his code name.
raywest ★
"Nimrod" is originally a king and hero mentioned in the Tanach and taken into the Bible and the Koran. His name is often used in the sense of "stalker," "hunter," and sometimes figuratively as "womanizer" as in "hunter of women." I've never seen it used to denote a nerdy person, and although I cannot disprove that connotation, I think given his role, the traditional meaning is more likely the intended one.
Doc ★
It's widespread enough that Wikipedia has an entire section on it: https://en.wikipedia.org/wiki/Nimrod#In_popular_culture