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