The armaments production programme is being sabotaged by a gang of Germans. A few arrests are made but the destruction of a vital plant goes on. Test pilot 'Bulldog' Bill Watson plunges headlong into the mystery.
| Actor | Role |
|---|---|
 Jack BuchananNot listed | Not listed |
 Greta GyntNot listed | Not listed |
 Sebastian ShawNot listed | Not listed |