toi le venin be robert hossein masterpiece and and one of the great thriller of the fifty . base on a frederic dard novel and a writer the director often work with ( see also le monte charge which hossein do not direct but in which he be the lead too ) and the screenplay grab you from the first picture on a desert road by night where a beautiful blonde might be the fieriest of the criminal to the mysterious house where he find his femme fatale . and her sister . then begin a cat and mouse play . one of the sister be in a wheelchair . but be she really disable . which one be the criminal who try to kill the hero on that night . the two actress and marina vlady and the late odile versois be sister . turn off all the light before watch . highly suspenseful .