Harvey is too scared to sleep in his own home alone, so he invites himself over to Sabrina's house, much to Aunt Hilda's annoyance.; Sabrina convinces a reluctant Hilda to give a door-to-door salesman a chance to make his pitch.; Sabrina recalls an incident during her childhood when she unwittingly gave Harvey a toy witchcraft kit.; Sabrina and Harvey run into one of Harvey's old teachers, who promptly recalls all of Harvey's younger exploits chasing girls.; Charley offers to trade bag lunches with Jinx.; Harvey constructs a model airplane.