The latest assignment for respected detective Charlie Chan has come directly from the government and involves the disappearance of a scientist named Harper, who was working on an extremely important serum. When the scientist is killed, Chan must sort through all very likely suspects, including the man's sister and his butler.
as Charlie Chan
as Birmingham Brown
as Eddie Chan
as Walter Meeker
as Jean Kent
as Sheriff Mack
as Louise Harper
as Stella Graham
as Roth
as Lloyd Archer
as Michael Strong
as Harper
as Inspector Godfrey
as Dr. Samuel R. Peabody
as Bellboy
as Officer Jim Kimball
as Police Officer (uncredited)
