Here are the remaining answers:

Tiger genus: Panthera. The quizmaster sends out category titles to his email list. We thought Tora! Tora! Tora! would be about Pearl Harbor, but it was actually all about tigers.

dreidel letters: nun, hey, gimmel, shin. I remembered gimmel, perhaps because it was the most unusual of the four. Then we went with the Hebrew letters we could remember: aleph and qoph, the latter being one of the ways to get rid of your Q in Scrabble if you lack a U.

Oh, and in Diner, there is a minor character -- I don't know if he's ever referred to by name -- who hangs around in the diner quoting Sweet Smell of Success. If Levinson's goal was to make people seek out that earlier movie, well, misison accomplished, at least in my case.