The Master Key

Before the outbreak of WWII, Nazi sympathizers plot to undermine America.

• George H. PlymptonScreenplay
• Ray TaylorDirector
• Joseph O'DonnellScreenplay
• Lewis D. CollinsDirector
• Ande LambScreenplay

• Milburn StoneAgent Tom Brant
• Jan WileyJanet Lowe
• Dennis MooreJack Ryan
• Addison RichardsGerhard Doenitz / Garret Donahue
• Byron FoulgerProf. Elwood Henderson
• Maris WrixonDorothy Newton
• Sarah PaddenAggie
• George LynnHerman
• Russell HicksPolice Chief Michael J. O'Brien
• Roland VarnoArnold Hoffman
• Lash LaRueMigsy
• Jerry ShaneDan