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

Bill Shine

The Guide

Ivan Samson

Admiral Loddon

Sebastian Saville

Michael Loddon

Richard Pearson

The Butler

Robert Shaw

First Photographer

Geoffrey Bayldon

Second Photographer

Arthur Howard

Car Salesman

Joyce Carey

Miss Sykes

Josephine Middleton

Mrs. Squire

Kenneth Griffith

Fitch

Vanda Hudson

Girl in Street

Sam Kydd

Newspaper Vendor (uncredited)