chunk: Linda and the others hide in the lab, while Matt and Carter take tranquilizer guns to hunt for Sebastian, using thermal imaging goggles. While on top of a pipe, Sebastian throws Carter toward a steel bar, which hits his carotid artery, and leaves him mortally wounded. Matt tries to shoot Sebastian, but is almost killed until Linda drags him to safety. After Carter dies from his injuries, Sarah heads to the freezer to get blood for a transfusion but is killed by Sebastian. He then kills Frank with a crowbar when he lets his guard down, and locks an injured Matt and Linda in the freezer-store room, leaving them to freeze to death. Linda then constructs an electromagnet using a defibrillator and other equipment, to open the freezer door. She then gathers parts to assemble a flamethrower. Sebastian goes to the lab and creates nitroglycerin and puts it in a centrifuge with a timer which is meant to destroy the facility after he leaves; he smashes the keyboard so nobody can stop the