The Lodge Mansion is invaded by an ancient viking sorcerer determined to punish Mr. Lodge for taking his favorite helmet as an archaeological souvenir.; Sabrina and her fellow witches must stop the supernatural practical jokes of a warlock known as The Blue Baron.; Harvey is demonstrating his stage magic for Sabrina and Hilda. To alleviate her boredom, Hilda sabotages one of the tricks.; Jughead begins speculating out loud about how accidents seem to mysteriously avoid Sabrina and that gets the others to wondering, too.; Gigi's new water bed is the cure for her sleeping problems.; Sabrina makes the mistake of letting Harvey fill Hilda's air mattress.; Sabrina uses magic to foil the amorous plans of her date.; Hilda's broom gets recalled.; Hilda gives Sabrina a birthday wish.