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

Lash LaRue

Migsy

Jerry Shane

Dan

Neyle Morrow

Spike

John Eldredge

Walter Stark

Ray Taylor

Lewis D. Collins