If you're a fan of the werewolf sub-genre of movies then you will undoubtedly know all of the classic tropes that have become somewhat stereotypical and predictable within most of them. Be it the werewolf's weakness for silver, the gypsy curse, or the classic poem that begins "Even a man who is pure in heart...". Well, those classic tropes all began with this classic film, and although this was not Universal's first Werewolf film, it was certainly the most popular.