In order to rid the town of the children, Alan devises a plan to detonate a bomb inside a briefcase in the children's classroom. By thinking of a brick wall, he is able to create a mental barrier and keep the presence of the time-bomb a secret from the children. Jill begs him to spare David because he is not like the others. Alan attempts to do this by asking David to leave the classroom to get his notebook from his car. The children begin to suspect that Alan is hiding something. Finally, Jill shows up and the children use mind control to stop her, but David rushes to her defense and knocks Mara over. Alan yells at Jill to take David and leave the building. Mara's "alien" face shows through while she breaks through Alan's defenses, revealing the bomb. The other children look at the clock, and the bomb explodes, killing everyone inside, including Alan. Jill holds David tightly outside by a car during the explosion.