chunk: Susan surmises that the Judas' accelerated metabolism has allowed it to reproduce and that they have evolved to mimic their human prey. The group formulates a plan to get the car moving: Peter will switch the power on, and Manny will switch the tracks. Susan projects that the Judas will spread throughout the tunnels unless they are able to kill the single fertile male. Manny finds Chuy but is killed by the male Judas, so Susan goes in search of him but finds only Chuy. Leonard's injured leg starts bleeding heavily, so he causes a distraction from the others, and is killed. Peter finds a dumbwaiter and puts Susan and Chuy in it, but stays behind to destroy the breed for good. He gets chased into a room where hundreds are nesting, and blows them all up by setting fire to a loose gas pipe, before diving underwater to safety.