Before the outbreak of WWII, Nazi sympathizers plot to undermine America.
Milburn Stone
as Agent Tom Brant
Jan Wiley
as Janet Lowe
Dennis Moore
as Jack Ryan
Addison Richards
as Gerhard Doenitz / Garret Donahue
Byron Foulger
as Prof. Elwood Henderson
Maris Wrixon
as Dorothy Newton
Sarah Padden
as Aggie
George Lynn
as Herman
Russell Hicks
as Police Chief Michael J. O'Brien
Roland Varno
as Arnold Hoffman
Lash LaRue
as Migsy
Jerry Shane
as Dan
