The younger brother of an officer in a secret government code-breaking unit gets involved with a gang of spies and a beautiful double agent.
Leon Ames
as Maj. Philip Waring
Charlotte Wynters
as Helen Lane
Joan Woodbury
as Therese Brahm
Don Dillaway
as Paul Waring
Gustav von Seyffertitz
as Albert Grood
Tenen Holtz
as Simon Herrick
Walter Bonn
as Anton Decker
Si Wills
as Lt. Clarke
George Lynn
as Lt. Tydall (as Peter Lynn)
Jason Robards Sr.
as Ellsworth
Sidney Miller
as Jimmy
Hooper Atchley
as Cmdr. Nash
