Charlie Chan is sought out by Pamela Gray, a desperate young socialite whose brother Paul awaits execution for the murder of a weapons inventor. Pamela is convinced of his innocence.
| Actor | Role |
|---|---|
 Warner OlandCharlie Chan | Charlie Chan |
 Drue LeytonPamela Gray | Pamela Gray |
 Ray MillandNeil Howard | Neil Howard |
 Mona BarrieLady Mary Bristol | Lady Mary Bristol |
 Douglas WaltonHugh Gray | Hugh Gray |
 Alan MowbrayGeoffrey Richmond | Geoffrey Richmond |
 George BarraudMajor Jardine | Major Jardine |
| PPaul EnglandBunny Fothergill | Bunny Fothergill |
 Madge BellamyBecky Fothergill | Becky Fothergill |
 Walter JohnsonJerry Garton | Jerry Garton |
 Murray KinnellPhillips | Phillips |
 E. E. CliveDet. Sgt. Thacker | Det. Sgt. Thacker |
| EElsa BuchananAlice Rooney | Alice Rooney |
| PPerry IvinsAsst. Home Secretary Kemp | Asst. Home Secretary Kemp |
 Reginald SheffieldFlight Cmdr. King (uncredited) | Flight Cmdr. King (uncredited) |
 Frank BakerBobbie (uncredited) | Bobbie (uncredited) |
 Mary GordonPrison Visitor (uncredited) | Prison Visitor (uncredited) |
 Claude KingRAF Aerodrome Commander (uncredited) | RAF Aerodrome Commander (uncredited) |
 David TorrenceHome Secretary | Home Secretary |
| JJohn RogersLake | Lake |