Diana Merrick
Neville Holderness
Dr. Hugh Trevelyan
David Furness
Jeffry Merrick
Sir Morton Holderness
Constance
Party Guest (uncredited)
French Police Inspector (uncredited)
Gendarme (uncredited)
Detective (uncredited)
Young Diana (uncredited)
French Hotel Concierge (uncredited)
Man Peering Into Room (uncredited)
Butler (uncredited)