Obsada:

• Basil Rathbone Sherlock Holmes
• Nigel Bruce Dr. John H. Watson
• Marjorie Lord Nancy Partridge
• Henry Daniell William Easter
• George Zucco Heinrich Hinkel, alias Richard Stanley
• John Archer Lt. Pete Merriam
• Gavin Muir Mr. Lang, government agent
• Edmund MacDonald Det. Lt. Grogan
• Don Terry Howe
• Bradley Page Cady, henchman with mustache
• Holmes Herbert Mr. Ahrens
• Thurston Hall Sen. Henry Babcock
• John Burton Army Inspector
• Eddie Coke Airplane Steward
• Evelyn Cook Nancy's Friend, at engagement party
• Caroline Cooke Mrs. Ruxton
• Kernan Cripps Hotel Porter
• Leslie Denison Transport Pilot
• Gilbert Emery Sir Henry Marchmont
• Alice Fleming Mrs. Jellison, society woman on train
• Mary Forbes Mother Pettibone
• Mary Gordon Mrs. Hudson
• Gerald Hamer Alfred Pettibone, alias John Grayson
• Leyland Hodgson Airport Official
• Alexander Lockwood Reporter
• Charles Marsh Reporter
• Tom Martin Kelner
• Irving Mitchell Laboratory Technician
• Clarence Muse George, the club car porter
• Gene O'Donnell Reporter
• Jason Robards Sr. Hotel Doorman
• Paul Scott Army Major
• Margaret Seddon Miss Pringle, mouse lady on train
• Lee Shumway Army Major at engagement party
• Regina Wallace Mrs. Partridge, Nancy's aunt
• Phil Warren Young Officer
• Ian Wolfe Antique Store Clerk
• Frederick Worlock Radio Announcer