Old Dark house is one of my mother’s favorite William Castle films, so we took a trip down memory lane together. Tom Poston stars as a young American invited to his eccentric British roomate’s family home for a weekend. The house is full of quirky relatives and one by one each is killed. Tom has to dodge the killer and try to solve the mystery. It’s more comedy than horror. Reminded me of High Spirits or Clue. Very cute.