Cast
Basil Dignam
Doctor Burgess
Nora Gordon
Newsagent's Wife
Desmond Llewelyn
Police Constable
Nigel Patrick
Superintendent Robert Hazard
Michael Craig
Inspector Phil Learoyd
Paul Massie
David Harris
Bernard Miles
Ted Harris
Richard Vernon
Doctor at Crime Scene
Peter Vaughan
Detective Whitehead (uncredited)
Yvonne Buckingham
Sapphire Robbins
Freda Bamford
Sgt. Cook
Rupert Davies
Ferris
Thomas Baptiste
Man on the Street
Philip Lowrie
Student
Susan Stranks
Student
Grace Arnold
Sapphire's Landlady
Dorothy Gordon
Lily
Lucy Griffiths
Johnnie Fiddle's Landlady
Boscoe Holder
Dancer in Nightclub
Olga Lindo
Mrs. Harris
Dolores Mantez
Student (International Club)
Earl Cameron
Dr. Robbins
Harry Baird
Johnnie Fiddle
Victor Brooks
Police Sgt.
Philip Ray
Mr. Young
Orlando Martins
Barman
Dan Jackson
Nightclub Owner
Lloyd Reckord
Pianist in International Club
Yvonne Mitchell
Mildred
Gordon Heath
Paul Slade
Barbara Steele
Student
Vanda Hudson
Girl at Tulip Club
John Richardson
Student