Halloween III: Season of the Witch (1982)

After the death of her father under suspicious circumstances, Ellie Grimbridge and Dr Daniel Challis decide to investigate the shady activities of Conal Cochran: the owner of the Silver Shamrock Novelties company. Before long, they discover Cochran's diabolical plot to brainwash the children of America into doing his bidding through a mixture of ancient rituals, technology, and witchcraft. This Halloween, wearing the mask of a skeleton, a witch, or a pumpkin can be deadly. Can Ellie and Daniel thwart the plans of the evil toy maker?