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