The Face at the Window is a melodramatic detective play written by F. Brooke Warren and first produced in 1897.
Plot.
Set in Paris, the play's villain is a serial killer named Le Loup, who precedes his killings with a loud wolf-howl. He is pursued by the master detective Paul Gouffet. In an iconic scene, Gouffet causes a dead victim to complete the act of writing his murderer's name by passing an electric current through the arm muscles.
Adaptations.
The 1897 play gave rise to a succession of film versions. The 1939 adaptation is the best known, but the list of adaptations includes:
References.
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