Mr. DuLac’s review:
A guilty pleasure. It does less to advance the Underworld Mythos as the three previous films did, but the story is a logical next step for the character of Selene. Was that logical next step properly executed is another matter. There's less melodrama and more action. You'd think that would be good, but it makes it kinda feel shallow compared to the previous ones. At the end of the day it's a genre B-Movie that's done better then most genre B-Movies.