When Dick storms in and starts taking off his clothes, you can see Tommy smile, and look away twice, trying to hide the fact that he's breaking character.
As Dick is trying to think of a way to infiltrate the women's study group, he says to himself "women only...." and repeats it in German as "kein Mensch; nur Frauen". However, "kein Mensch" actually means "no human". The correct phrase would have been "keine Männer".