
When his mother eloped with an Italian opera singer, Louis Mazzini was cut off from her aristocratic family. After the family refuses to let her be buried in the family mausoleum, Louis avenges his mother's death by attempting to murder every family member who stands between himself and the family fortune. But when he finds himself torn between his longtime love and the widow of one of his victims, his plans go awry.
Cast

Dennis Price
Louis Mazzini / His Father

Alec Guinness
The D'Ascoyne Family: The Duke / The Banker / The Parson / The General / The Admiral / Young Ascoyne / Young Henry / Lady Agatha

Joan Greenwood
Sibella

Valerie Hobson
Edith D'Ascoyne

Audrey Fildes
Mama

Miles Malleson
The Hangman

Clive Morton
The Prison Governor

John Penrose
Lionel Holland

Cecil Ramage
Crown Counsel

Hugh Griffith
Lord High Steward

John Salew
Mr. Perkins
Eric Messiter
Inspector Burgoyne
Lyn Evans
The Farmer
Barbara Leake
The Schoolmistress
Peggy Ann Clifford
Maud Redpole
Anne Valery
The Girl in the Punt

Arthur Lowe
The Reporter

Peter Gawthorne
First Lord Delivering Verdict (uncredited)
Molly Hamley-Clifford
Lady Redpole (uncredited)
Leslie Handford
Gamekeeper Hoskins (uncredited)
Cavan Malone
Young Graham (uncredited)

Jeremy Spenser
Young Louis (uncredited)

Carol White
Young Sibella (uncredited)

Laurence Naismith
Warder in Jail (uncredited)
Gordon Phillott
Clerk of Parliament (uncredited)

Richard Wattis
Defence Counsel (uncredited)
Harold Young
Captain (uncredited)
Crew

Robert Hamer
Director, Screenplay
John Dighton
Screenplay
Nancy Mitford
Screenplay
Roy Horniman
Novel
Peter Tanner
Editor
Roy Baker
Assistant Editor
John Jympson
Assistant Editor

Douglas Slocombe
Director of Photography
Norman Priggen
Assistant Director
Hal Mason
Production Supervisor

Michael Balcon
Producer

Michael Relph
Associate Producer
Jeff Seaholme
Camera Operator
Anthony Mendleson
Costume Design
Barbara Barnard
Hairstylist
Pearl Orton
Hairstylist
Daphne Martin
Hairstylist
Ernest Taylor
Makeup Artist
Harry Frampton
Makeup Artist
Bert Davey
Assistant Art Director
Stephen Dalby
Sound Director
John W. Mitchell
Sound Recordist
Sydney Pearson
Special Effects
Geoffrey Dickinson
Special Effects
Ernest Irving
Original Music Composer, Conductor

Wolfgang Amadeus Mozart
Music
Philharmonia Orchestra
Music
Phyllis Crocker
Continuity

Seth Holt
Editorial Services
Leigh Aman
Unit Production Manager
William Kellner
Art Direction
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