Actors

Actor

Sherlock Holmes

Actor

Doctor Watson

Actor

Nancy Partridge

Actor

William Easter

Actor

Heinrich Hinckel aka Richard Stanley

Actor

Naval Lt. Pete Merriam

Actor

Mr. Lang, government agent

Actor

Detective Lt. Grogan

Actor

Howe

Actor

Mrs. Hudson

Actor

Cady

Actor

George

Actor

Mrs. Pettibone

Actor

Mr. Ahrens

Actor

Sen. Henry Babcock

Actor

Antiques Store Sales Clerk

Actor

Army Inspector (uncredited)

Actor

Alfred Pettibone

Actor

Sir Henry Marchmont (uncredited)

Actor

Miss Pringle (uncredited)