The accused German officer in this case is named Colonel Hugo Hauptmann. Hauptmann is the German name for the Army rank of Captain. In other words, his name means Colonel Captain.
The episode title "Klink for the Defense (1971), is a parody of another television show, Judd for the Defense (1967), a legal drama focusing on a defense lawyer's cases. It was being produced at roughly the same time as Hogan's Heroes (1965).
According to Sergeant Schultz's recollection when answering Major Hochstetter's question as to how long Hogan has been running the camp, he said 3 years ago November. Unless the setting for this episode is mid- to late-1945, this would mean that Hogan was there in November 1941, before the United States was in the war.
The Gestapo agent/Fraulein Hibbler (Lynnette Mettey) said she was Colonel Hauptman's (Sandy Kenyon) secretary for 2 months, one week, three days.
Once again they incorrectly dress Major Hochstetter in the uniform of a SS Colonel. A Major in the SS has four pips arranged in a square on the left collar not a single leaf