Underworldin (yäk) ohjaaja Len Wiseman kertoo Fangorian jutussa, mikä teki leffasta ainutlaatuisen:

I believe we did something new with the first one. I mean, I had never seen a werewolf film that was also an action movie.

Underworld has invited comparison with the Blade series. While both are dark-toned action/horror hybrids concerning vampires and conspiracies, Wiseman points out what he believes are crucial distinctions. “The biggest difference, of course, is that BLADE doesn’t have werewolves. There hasn’t been any other movie in the last 15 or 20 years with both vampires and werewolves.”