Synopsis
Two Scotland Yard detectives investigate the murder of a young woman of mixed race who had been passing for white. As they interview a spate of suspects -- including the girl's white boyfriend and his disapproving parents -- the detectives wade through a stubbornly entrenched sludge of racism and bigotry.
Cast

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
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