Reporter vs. German spies and their new metal.
| Actor | Role |
|---|---|
 Warren HullBill MacGregor | Bill MacGregor |
 Kay LinakerSonia Manning | Sonia Manning |
 Wilhelm von BrinckenProfessor Werner | Professor Werner |
 George ClevelandJohn MacGregor | John MacGregor |
 Fern EmmettAunt Mary | Aunt Mary |
 Edward KeaneNewspaper Editor | Newspaper Editor |
 Willy CastelloEric Bowman | Eric Bowman |
 John SheehanMarden | Marden |
| HHerbert CorthellPete | Pete |
| VVince RushGruen | Gruen |