
A California commercial pilot sees a telecast in London of an interview with Sir Mark Lodden at his home. The Canadian is convinced that the baronet is a fraud, and he is actually a look-alike actor named Frank Welney.
Cast

Dirk Bogarde
Sir Mark Loddon / Frank Welney / Number Fifteen

Olivia de Havilland
Lady Margaret Anne Loddon

Paul Massie
Jeffrey Buckenham

Robert Morley
Sir Wilfred

Wilfrid Hyde-White
Hubert Foxley

Anthony Dawson
Gerald Loddon

Richard Wattis
The Judge
Richard Dimbleby
Himself

Martin Miller
Dr. Schrott

Millicent Martin
Maisie

Toke Townley
Associate
Deering Wells
Editor

Bill Shine
The Guide

Ivan Samson
Admiral Loddon

Sebastian Saville
Michael Loddon

Richard Pearson
The Butler

Robert Shaw
First Photographer

Geoffrey Bayldon
Second Photographer

Gordon Sterne
Maddox

Arthur Howard
Car Salesman

Joyce Carey
Miss Sykes

Josephine Middleton
Mrs. Squire

Kenneth Griffith
Fitch
Barbara Archer
Barmaid
Tony Doonan
Man at Bar

Vanda Hudson
Girl in Street
Victor Harrington
Barrister (uncredited)

Sam Kydd
Newspaper Vendor (uncredited)
Reg Thomason
Barrister (uncredited)
Crew

Anthony Asquith
Director

Anatole de Grunwald
Screenplay, Producer

Karl Tunberg
Screenplay
Frank Clarke
Editor

Robert Krasker
Director of Photography
David Middlemas
Assistant Director
Pierre Rouve
Associate Producer

Irene Howard
Casting

Christian Dior
Costume Design
Joan Johnstone
Hairstylist
Bill Lodge
Makeup Artist
Robert Carrick
Sound Editor
J.B. Smith
Sound Mixer
A.W. Watkins
Sound Recordist
Gerry Turner
Sound Recordist
Tom Howard
Visual Effects
Benjamin Frankel
Music, Compositor
Maurice Fowler
Set Dresser
Roy Parkinson
Executive In Charge Of Production
Edward Wooll
Original Story
Paul Sheriff
Art Direction
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