Michael Redgrave
— Sir Arthur Benson-Gray
Tony Britton
— Philip Selwood
Carl Möhner
— Carl Romek
Niall MacGinnis
— Neil Isherwood
Vanessa Redgrave
— Pamela Benson-Gray
Ian Bannen
— Alan Crabtree
Brenda Bruce
— Elizabeth Fallon
Lionel Jeffries
— Walter Froy
Miles Malleson
— Sir Oswald Pettiford
John Welsh
— Colonel Langley
Ann Firbank
— Mrs. Judson
Jack Hedley
— Dr. Galbraith
Hugh Miller
— Examiner
Mary Skinner
— Theatre Sister
Margaret Tyzack
— Night Sister
William Roache
— Young Doctor (uncredited)