The Master Key Cast & Crew
Milburn StoneAgent Tom Brant Addison RichardsGerhard Doenitz / Garret Donahue Byron FoulgerProf. Elwood Henderson Maris WrixonDorothy Newton Russell HicksPolice Chief Michael J. O'Brien Roland VarnoArnold Hoffman John EldredgeWalter Stark Joseph O'DonnellScreenplay George H. PlymptonScreenplay William A. SicknerDirector Of Photography Maury GertsmanDirector Of Photography 
