63 mins | Drama, Action, Adventure | Jan. 20, 1940
63 mins | Drama, Action, Adventure | Jan. 20, 1940
| Producers | Monogram Pictures |
| Original title | Hidden Enemy |
| Directors | W.B. Eason, Howard Bretherton |
| Writers | Marion Orth, Charles Williams |
as Bill MacGregor
as Sonia Manning
as Professor Werner
as John MacGregor
as Aunt Mary
as Newspaper Editor
as Eric Bowman
as Marden
as Pete
as Gruen