There was a full moon on The Vampire Diaries last night, and that can only mean one thing: Werewolves. It is impossible for a vampire TV show to exclude the furry monsters.

How exactly do werewolves fit into The Vampire Diaries mythology?

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Basically, vampires and werewolves are mortal enemies, and a werewolf bite can kill a vamp.

Here's a brief taste of a werewolf in action.

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So glad he didn't kill the newly sired Caroline. She's wonderful! Just have a look at her spot-on assessment of Stefan.

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What would we do without that?