The Master Key

Milburn Stone

Agent Tom Brant

Jan Wiley

Janet Lowe

Dennis Moore

Jack Ryan

Addison Richards

Gerhard Doenitz / Garret Donahue

Byron Foulger

Prof. Elwood Henderson

Maris Wrixon

Dorothy Newton

Sarah Padden

Aggie

George Lynn

Herman

Russell Hicks

Police Chief Michael J. O'Brien

Roland Varno

Arnold Hoffman