The entire Nazi/sandwich exchange was great, but particularly:
Tom: Atheists hate Hitler.
H-Man: Do they?
Tom: [silence]
...
...
YES
Just the way he said that has been stuck in my head all day.
Like many, I really grew to like the H-Man by the end of the show, but one of the best moments for me was still when it became clear that Tom's departure is not imminent.