Donald Bisset

Several murders of nuclear scientists, that baffles Scotland Yard, occur in London about the same time that Bill Locklin, a special officer from the United States State Department, arrives to oversee the transfer of Professor Leon Dushenko, a Russian scientist who as fled the U.S.S.R. An attempt is made on Dushenko's life with a monkey's paw-print found at the scene... (imdb)

Vineyard owner marquis Philippe de Montfaucon is called back to his castle Bellenac because of another dry season. He asks his wife and children to remain in London, but they still come after him. His wife Catherine de Montfaucon soon discovers that her husband is acting mysteriously and that his employees are following old pagan rituals that call for the life of the marquis himself to save the crops. (imdb)