Charlie Chan is an agent of the US government working in Washington DC and he is assigned to investigate the murder of the inventor of a highly advanced torpedo. Aiding Chan is his overeager but dull-witted son Tommy and his daughter Iris.
Sidney Toler
as Charlie Chan
Mantan Moreland
as Birmingham Brown
Arthur Loft
as Inspector Jones
Gwen Kenyon
as Inez Arranto
Sarah Edwards
as Mrs. Hargue
George J. Lewis
as Paul Arranto
Marianne Quon
as Iris Chan
Benson Fong
as Tommie Chan
Muni Seroff
as Peter Laska
Barry Bernard
as David Blake
Gene Roth
as Luis Philipe Vega
Eddy Chandler
as Lewis
