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

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

Philip Ray

Mr. Young

Lloyd Reckord

Pianist in International Club

John Richardson

Student

Richard Vernon

Doctor at Crime Scene

Dolores Mantez

Student (International Club)

Boscoe Holder

Dancer in Nightclub