Description
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.
Casts:
Sidney Toler
Mantan Moreland
Edwin Luke
Hardie Albright
Janet Warren
Al Bridge
Edith Evanson
Dorothy Granger
