Cretaceous: Biohazard #3

Issue 3 finds our squad separated into pairs, risking their lives against the undead horde of both man and dinosaur. With few clues as to the whereabouts of their target, all they can do is continue to search and survive. Meanwhile, we're given a glimpse into the drug that began all of this. Who are the mysterious agents who seek to steal the compound, what are they hoping to accomplish, and how did all of this lead to the mass destruction our heroes found the mysterious facility in when they arrived?