One of the secrets to Wolverine's enduring popularity, both in Marvel's comics and in various adaptations, is that there are two distinct versions of the character. Both have their fans, and both exist more or less concurrently. Sometimes he'll flip back and forth between them in one story.

The first Wolverine, and the most famous, is a short, hairy ball of imminent violence. As his codename suggests, this Wolverine is as potentially dangerous to his allies as his enemies, and has never even heard of anger management; there's a reason why many of the most iconic images of Wolverine involve him trying to kill another superhero.

This Logan is hard to like, but once you get the obligatory fight over with, he's a good man to have on your side. Whenever Wolverine showed up for a guest appearance in someone else's book, this was usually who you could expect to get.

The second Wolverine, conversely, is the one who's actually got a third dimension. He's over a hundred years old, and while his memory's often full of holes, he's still got the experience. This was the version of Wolverine who had........

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