Irving Pichel
Nicolas Zarnoff
Ted Pearson
Agent Steve Lockwood
Walter Miller
Henchman Robal
George Douglas
Henchman Sandoval
Kenneth Harlan
FBI Chief Clive Anderson [Chs. 13-15]
Julian Madison
Agent Foster
Ted Mapes
Agent Dan Murchison
Jennifer Jones
Gwen Andrews
Harry Humphrey
Warden Stover
Broderick O'Farrell
Russell
George Allen
Barge Crewman
Louis Caits
Jerry the Human Fly
Eddie Cherkose
Thug in Ghost Town
George Cleveland
Gramps Williams
Tris Coffin
Emissary Zobar (uncredited)
Russell Collier
Police Dispatcher
Curley Dresden
Thug on Boat
James Fawcett
Thug in House
Edward Hearn
Forest Ranger
Lloyd Ingraham
Judge Stoddard
Perry Ivins
Emissary Telef
Ray Johnson
Phony Gas Station Attendant
William Lally
Thug in Ghost Town
Bert LeBaron
Thug at Lighthouse
Carey Loftin
Trooper on Foot
Merrill McCormick
Green's Assistant
Millard McGowan
Thug at Hangar
Sammy McKim
Sammy Williams
Frank Meredith
Officer Duffy
Walter Merrill
Junior Officer
Bruce Mitchell
Prison Guard
Monte Montague
Bayside Dock Thug
Bill Nestell
Thug in Truck
Frank O'Connor
Army Captain
Eddie Parker
Bayside Dock Thug
Charles Phillips
Thug on Barge
Allen Pomeroy
Bayside Dock Thug
Fred Schaefer
Bayside Dock Thug
Charles Sherlock
Car 14 Trooper
Tom Steele
Lighthouse and House Thug
Bernard Suss
Emissary Lassen
Josef Swickard
Presidente Huenemo Mendoza
Forrest Taylor
Mr. Stevens
Herman E. Webber
James Robinson
Wally West
Henchman in Office
Bill Wilkus
Thug at Hangar
Bud Wolfe
Bill / 3rd Ghost Town Thug
Joe Yrigoyen
Barge Crewman
