Heil Klink - S2-E22
Continuity mistake: In the beginning, Carter and Newkirk are wiring in the explosives. As they run the spool of wire, first it unrolls clockwise, then counter clockwise between shots.
Heil Klink - S2-E22
Continuity mistake: After the phone call leading Klink to believe Hitler is coming by, he stands and goes to Hogan. As he stands over Hogan, he is gesturing with his left hand. When the camera angle changes, he's using his right hand.
Heil Klink - S2-E22
Continuity mistake: As Brauner, dressed as Shultz, gets into the staff car, he has no glasses on, as Shultz does not routinely wear them. After the shot cuts to Shultz and back to Brauner, and as the car pulls away, you see Brauner with horn rimmed glasses suddenly on.
Heil Klink - S2-E22
Continuity mistake: The light switch for Klink's office is usually located right next to the door, with the wires going up toward the ceiling. This time, the switch is missing.
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