"A man and a woman are poisoned. The woman dies, but the man survives. The finger of blame begins to point at the man. A policeman and a newspaper journalist pursue the truth."
Jack Watling
as Dennis Willows
Rona Anderson
as Sallie Harbord
John Horsley
as Peter Hastings
Russell Napier
as Inspector Simmons
Kenneth Kent
as Dr. Julian Cole
Mary Jones
as Florence Cole
Alastair Hunter
as Sgt. Thorpe
Joan Hickson
as Miss Edinger
John Le Mesurier
as Phinneas Tilliard
June Ashley
as Madeline Tilliard
Hélène Burls
as Mrs. James
Charles Hammond
as Juror at Inquest (uncredited)
Edward French
as Bit Part (uncredited)
Peter Gilmore
Arthur Gross
Pat Hagan
as Police Officer at Inquest (uncredited)
Neil Hallett
as Police Constable Guarding Hastings' Home (uncredited)
Humphrey Morton
as Usher (uncredited)
Bartlett Mullins
as Coroner (uncredited)
Richard Neller
Dandy Nichols
as Waitress (uncredited)
Alan Robinson
as Porter (uncredited)
Hugh Stewart
as Policeman (uncredited)
John Wilder
Charles Saunders
Director
Doreen Montgomery
Writer
Jack Slade
Editor
James Wilson
Director of Photography
Clive Nicholas
Producer
Frank Chacksfield
Original Music Composer
David Butcher
Art Direction
Betty Baugh
Hairstylist
Michael Morris
Makeup Artist
Fred A. Swan
Production Supervisor
René Dupont
Second Assistant Director
A.E. Rudolph
Sound Recordist
Peter T. Davies
Sound Re-Recording Assistant
Peter Lamb
Clapper Loader
Nobby Smith
Focus Puller
Eric Boyd-Perkins
First Assistant Editor
Conductor
Joanna Busby
Continuity