True as a Turtle

John Gregson

Tony Hudson

Cecil Parker

Dudley Partridge

June Thorburn

Jane Hudson

Keith Michell

Harry Bell

Elvi Hale

Ann

Avice Landone

Valerie Partridge

Jacques Brunius

Monsieur Charbonnier

Gabrielle Brune

Mary

Sin foto

Charles Clay

Sir Harold Brazier

Betty Stockfeld

Lady Brazier

Michael E. Briant

Paul

Sin foto

Pauline Drewett

Susan

John Harvey

First Officer

Clement Freud

Croupier (uncredited)

Beth Rogan

(uncredited)