Eugene discovers that Beverly has hidden a collection of serial killer memorabilia beneath their mattress. That evening at dinner, Chip comments that his friend Scotty thinks that she is the killer. Beverly immediately leaves in her car; fearing for Scotty's life, the rest of the family head for his house. Unbeknownst to them, Beverly actually intends to kill Eugene's patient Ralph Sterner and his wife, Betty, for calling Eugene to treat her husband's chronic toothache on a day they were supposed to spend birdwatching. She stabs Betty with scissors borrowed from the Sutphins' neighbor, Rosemary; and pushes an air conditioner from the Sterners' window onto Ralph. Meanwhile, the rest of the family and the police arrive at Scotty's house, only to find him in his room masturbating to "Deadly Weapons".