"A mysterious woman in black moves in with married Manhattan thrill-seekers and helps one trick the other."
Simone Signoret
as Lisa Schindler
James Caan
as Paul Montgomery
Katharine Ross
as Jennifer Montgomery
Don Stroud
as Norman
Kent Smith
as Harry Gordon
Estelle Winwood
as Miss Beattie
Marjorie Bennett
as Nora
Ian Wolfe
as Dr. Edwards
Anthony Eustrel
as Winthrop
Eloise Hardt
as Celia
George Furth
as Terry
Peter Brocco
as Count
William O'Connell
as Party Guest
Ena Hartman
Joanne Medley
Jeff Scott
Carmen Phillips
as Holly
Eddra Gale
Rachel Rosenthal
Luana Anders
Robert Aiken
Max Lewin
Florence Marly
as Baroness
Carl Guttenberger
as Arthur
Pitt Herbert
as Pharmacist
Stuart Nisbet
as Detective
Kendrick Huxham
as Bookseller
Richard Guizon
as Masseur
Adele Claire
as Police Matron (uncredited)
Hal W. Polaire
Unit Production Manager
Robert Bertrand
Sound
Bud Westmore
Makeup Artist
Waldon O. Watson
Alexander Golitzen
Art Direction
Larry Germain
Hairstylist
Morton Haack
Costume Design
Assistant Director
Norbert Jobst
Title Designer
John McCarthy Jr.
Set Decoration
Joseph Gershenson
Music Supervisor
James Redd
William D. DeCinces
Sheryl Deauville
Assistant Costume Designer
George Edwards
Story
Curtis Harrington
Director
Gene R. Kearney
Screenplay
Samuel Matlovsky
Original Music Composer
Douglas Stewart
Editor
William A. Fraker
Director of Photography
Producer
John W. Hyde
Associate Producer
