An effective shocker which has the blind Hepburn alone in the house when psychotic villain Arkin and his hoodlum pals (Crenna and Weston) arrive to retrieve a doll containing heroin which her husband (Zimbalist) unwittingly brought through customs for them. The nail- biting climax, during which Hepburn turns the tables by smashing the light-bulbs and leaving the place in darkness, is a classic. Though based on a stage play (by Frederick Knott), the skilful use of interiors for once transcends the visual limitations.