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Le Spectre Vert (The Green Spook) is the French-language version of MGM's The Unholy Night. The original English version was directed by Lionel Barrymore, while the French adaptation was helmed by Jacques Feyder. No changes were made in the plot, which concerned the mysterious methodical murders of several retired British military officers. All of the victims had been members of the same regiment in India, a fact which puts terror in the hearts of the surviving officers. These survivors are gathered together in the home of Lord Montague (Andre Luguet, in the role originally played by Roland Young); the next morning, all the officers except Montague are found strangled. Struggling to solve the mystery and stop the killings is Inspector Ramsay of the Yard (Claude Fleming in the English version, Jules Raucourt in the French), who uses a seance to coerce the guilty party into confessing. Boris Karloff, cast in the small role of a Hindu servant in The Unholy Night, repeated this assignment in Le Spectre Vert.