Sweater Vampire ambushes them as they visit Amy, then crawls off the roof, where he commands Amy to kill them, which she obeys because she is vampirizing now. But Peter Vincent repels her with a cross because he has faith now.
Charlie and Peter run around the house until Sweater Vampire leaps through a window to challenge Peter Vincent to a duel so he can start giggling. But he doesn't have enough faith to repel the big vampire. Oh wait nevermind he does now.