Milburn Stone
(Agent Tom Brant)
(Agent Tom Brant)
Jan Wiley
(Janet Lowe)
(Janet Lowe)
Dennis Moore
(Detective Lt. Jack Ryan)
(Detective Lt. Jack Ryan)
Addison Richards
(Gerhard Doenitz (alias Garret Donahue))
(Gerhard Doenitz (alias Garret Donahue))
Byron Foulger
(Prof. Elwood Henderson)
(Prof. Elwood Henderson)
Maris Wrixon
(Dorothy Newton)
(Dorothy Newton)
Sarah Padden
(Aggie)
(Aggie)
George Lynn
(Herman (Chief Thug))
(Herman (Chief Thug))
Russell Hicks
(Police Chief Michael J. O'Brien)
(Police Chief Michael J. O'Brien)
Roland Varno
(Arnold Hoffman (aka Hoff M-3))
(Arnold Hoffman (aka Hoff M-3))
Lash La Rue
(Migsy (Street Urchin))
(Migsy (Street Urchin))
Jerry Shane
(Dan (Boy's Club Member))
(Dan (Boy's Club Member))
Neyle Morrow
(Spike (Boy's Club Member))
(Spike (Boy's Club Member))
John Eldredge
(Walter Stark)
(Walter Stark)
Walter Bonn
(Heifel)
(Heifel)
Ernie Adams
(Flash Faust)
(Flash Faust)
George M. Carleton
(Jakob Braun (aka Jake Brown M-7))
(Jakob Braun (aka Jake Brown M-7))