The Old Dark House

William Castle directs this adaptation of the 1932 film of the same name.

American car salesman Tom Penderel (Tom Poston) is travelling through England when he decides to go and stay in an old Dartmoor country house with his friend Casper Femm (Peter Bull).

Upon his arrival he is informed of Casper's untimely death and is then introduced to the rest of the family.

However, as the evening draws on, members of the family are struck down one by one and the murderer must be found before there is no one left alive...