Trivia: In the gym, Carter isn't wearing his gloves. Therefore, the wedding ring that Larry Hovis wore in real life was visible. He wore the gloves because he steadfastly refused to remove it.
Trivia: Werner Klemperer (Kommandant Wilhelm Klink) was born in 1920. So here when he says to Carter, "I am 49", he's declaring his real age.
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. (As another contributor previously posted, the term "nimrod" is slang for a nerdy, doofus type of person, though it's unclear why that was his code name).
raywest ★