Inspector Lohmann
I just watched The Serpent's Egg (in my ongoing pursuit to slowly absorb Bergman's catalog). The movie was not great, but certainly interesting (and not nearly as disturbing as some reviews lead to believe - although in 1977 it must have held more potency).
I was curious about a throwaway line in the middle of the film (44 min. in). Inspector Bauer (Frobe) says that he is going to write a letter to Inspector Lohmann, "who is working on another case that also seems insane." I can't help wondering if that is a reference to the reappearing character in several of Fritz Langs' films (notably M and the great The Testament of Dr. Mabuse). Being that this was a German production and taking place in Germany in roughly the same time period, it makes some sense. Anyway just a thought...