Drama Mystery Thriller
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.
Directed by
Anthony Asquith
Olivia de Havilland
Lady Margaret Anne Loddon
Robert Shaw
First Photographer
Wilfrid Hyde-White
Hubert Foxley
Geoffrey Bayldon
Second Photographer
Dirk Bogarde
Sir Mark Loddon / Frank Welney / Number Fifteen
Robert Morley
Sir Wilfred
Anthony Dawson
Gerald Loddon
Millicent Martin
Maisie
Sam Kydd
Newspaper Vendor (uncredited)
Kenneth Griffith
Fitch
Richard Wattis
The Judge
Richard Pearson
The Butler
Joyce Carey
Miss Sykes
Martin Miller
Dr. Schrott
Bill Shine
The Guide
Toke Townley
Associate
Paul Massie
Jeffrey Buckenham
Arthur Howard
Car Salesman
Richard Dimbleby
Himself
Vanda Hudson
Girl in Street
Ivan Samson
Admiral Loddon
Josephine Middleton
Mrs. Squire
Sebastian Saville
Michael Loddon
Deering Wells
Editor
Gordon Sterne
Maddox
Barbara Archer
Barmaid
Tony Doonan
Man at Bar
Victor Harrington
Barrister (uncredited)
Reg Thomason
Barrister (uncredited)

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