Diana Merrick
Neville Holderness
Dr. Hugh Trevelyan
David Furness (as John Mack Brown)
Jeffry Merrick
Sir Morton Holderness
Constance
Party Guest (uncredited)
French Police Inspector (uncredited)
Servant at Davids Death Investigation (uncredited)
Gendarme (uncredited)
Detective (uncredited)
Diana - as a Child (uncredited)
French Hotel Concierge (uncredited)
Man Peering Into Room (uncredited)
Butler (uncredited)