as Capt. Hugh 'Bulldog' Drummond
as Algernon 'Algy' Longworth
as Estelle Prager, alias Estelle Gorday
as Cynthia Stedman
as Phillip Coleman
as Seymour
as Police Insp. McIver
as Edward Vane
as Dr. Ashley Stedman
as Prager - Antique Dealer (uncredited)