"A young heiress finds evidence suggesting that at night she acts under the influence of a family curse and has begun committing ghastly murders in a nearby park."
Don Porter
as Barry Lanfield
June Lockhart
as Phyllis Allenby
Sara Haden
as Martha Winthrop
Jan Wiley
as Carol Winthrop
Lloyd Corrigan
as Detective Latham
Dennis Hoey
as Inspector Pierce
Martin Kosleck
as Dwight Severn
Eily Malyon
as Hannah, the Housekeeper
Frederick Worlock
as Park Patrol Constable-in-Charge Ernie Hobbs
Clara Blandick
as Mrs. McBroom (uncredited)
James Finlayson
as Constable (uncredited)
Olaf Hytten
as Constable Alfred (uncredited)
Warren Jackson
William H. O'Brien
Brick Sullivan
David Thursby
as Constable Herbert (uncredited)
Joan Wells
as Phillis — as a Child (uncredited)
Jean Yarbrough
Director
Dwight V. Babcock
Original Story
George Bricker
Screenplay
Jack Otterson
Art Direction
Paul Landres
Editor
Vera West
Costume Design
Maury Gertsman
Director of Photography
Leigh Smith
Set Decoration
Jack Pierce
Makeup Artist
Ben Pivar
Producer
William Lava
Original Music Composer
Abraham Grossman
Russell A. Gausman
Bernard B. Brown
Sound Director
Raymond Kessler
Dialogue
Joe Lapis
Sound Mix Technician
Music Director
Ralph Slosser
Assistant Director
Frank Skinner
Music