available on dvd
Starring: Tom Poston, Robert Morley, Janette Scott, Joyce Grenfell, Mervyn Johns
An American car salesman in England, Tom Penderel one stormy night finds an eccentric millionaire client, Casper Femm, murdered in the old, dark house he shared with weapons-collector Roderick Femm; Casper’s mother Agatha; his twin brother Jasper; two young cousins, Cecily and Morgana, both of whom are attracted to Tom; and Morgana’s father who would willingly murder the American for even looking at the girl.
Agatha, Jasper and Roderick are brutally slain an hour apart, on the hour. Suspected of murder and simultaneously the unsuspecting victim of various murder traps, Tom uncovers the real killer in time to prevent total destruction of the old dark house and its few remaining survivors.