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