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