Ethan Hawke’s Edward Dalton is the weary heartbeat of the story — a hematologist whose white coat hides growing doubt. He moves through labs and corporate boardrooms with the same exhausted precision, testing blood as if each vial might answer the question gnawing at him: What happens when the food supply runs out? Willem Dafoe’s Elvis, a wild-eyed vampire with messy moral clarity, sparks scenes with a crackling, offbeat energy. Abigail Breslin cuts through the gloom as the one human who might tilt the balance; her presence is a reminder of stakes that are more than economic.