Chan is faced with suspects in a stolen atomic bomb formula case, that are being killed with bullets that are not fired from a gun.

Charlie Chan

Insp. Luis Carvero

Tommy Chan

Alfred Wyans (as Robert E. Keane)

Chattanooga Brown

Marguerite Fontain

Countess Irena Masak

Joseph Brandish

Edmond Slade

Charles Masack

Prentiss

Iris Ling (as Jean Wong)
August 1, 1945

Charlie Chan

Insp. Luis Carvero

Tommy Chan

Alfred Wyans (as Robert E. Keane)

Chattanooga Brown

Marguerite Fontain

Countess Irena Masak

Joseph Brandish

Edmond Slade

Charles Masack

Prentiss

Iris Ling (as Jean Wong)

