Blackmailed

Mai Zetterling

Mrs. Carol Edwards

Fay Compton

Mrs. Christopher

Dirk Bogarde

Stephen Mundy

Robert Flemyng

Dr. Giles Freeman

Michael Gough

Maurice Edwards

James Robertson Justice

Mr. Sine

Joan Rice

Alma

Wilfrid Hyde-White

Lord Dearsley

Cyril Chamberlain

Police Constable

Harold Huth

Hugh Sainsbury

Nora Gordon

Sine's Housekeeper

Charles Saynor

Police Constable - Giles' Car

Derrick Penley

Patrick

Peter Owen

Chief Printer

Dennis Brian

Sub-Editor

Arthur Hambling

Inspector Canin

Shirley Wright

Mary

Bruce Seton

Supt. Crowe

Michael Ingham

Crowe's Assistant

Johnnie Schofield

Maurice's Taxi Driver

Marianne Stone

Maggie

Betty Cooper

Giles' Assistant

Vernon Greeves

Hugh's Secretary

Lillian Shaw

Bathing Beauty Competitor