At what point did you figure out the identity of the werewolf?
I watched this movie before I was ten years old, and I don't remember when or if I figured out the identity of the werewolf. I was probably too young to figure it out anyway.
Years later, I was able to find the movie again (perhaps my favorite from the "series"), but I obviously already knew how it ended. I tried to think about when I would have theoretically figured it out. My best guess would be when the entire group goes into the dungeon.
Jonathan: Dies; obviously not him
Richard and Catherine: Too busy arguing.
Anna: Had the gun and apparently shoots a dying Jonathan
The Count: Gave his gun to Anna (for some silly reason when he suspects one of them being a werewolf); if he were the werewolf, he certainly wouldn't have given his weapon to a potential victim.
Hungarians: Obviously with the Count, so it would stand to reason that they are innocent too.
David: Was with the Hungarian maid, until she ditched him; still obviously not him.
Mary Lou: Was with Jonathan when he was being chased, and "wakes up" claiming that the creature left her in order to chase Jonathan.
Brienne: "Any last words?"share
Stannis: "Why a peach?"