Tom Conway

Capt. Hugh 'Bulldog' Drummond

John Newland

Algernon 'Algy' Longworth

Maria Palmer

Estelle Prager, alias Estelle Gorday

Helen Westcott

Cynthia Stedman

William Stelling

Phillip Coleman

Terry Kilburn

Seymour

Gordon Richards

Police Insp. McIver

Harry Cording

Edward Vane

John Goldsworthy

Dr. Ashley Stedman