Disney: Mystery in Dracula's Castle, 1973

Marsha Booth, a single mother with two boisterous young sons, is a book writer on a deadline. Since it means leaving their best friend, Morgan, in the city for a quiet small beach town where nothing ever occurs, the guys are not thrilled about the idea of spending the summer in their leased seaside home. Young filmmaker Alfie, the oldest, chooses to utilize the nearby lighthouse as "Dracula's Castle" with his younger brother Leonard playing the lead.