

"A MYSTERY MANSION...Where death lurks in every dark corner and a mad genius runs loose!"
Overview
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.

Dorothy Granger
Stella Graham

Cyril Delevanti
Roth

Jack Ingram
Lloyd Archer

Lester Dorr
Michael Strong

Frank Reicher
Harper

Henry Hall
Inspector Godfrey
Joe Whitehead
Dr. Samuel R. Peabody
Danny Desmond
Bellboy