| Person | Type | Job | Role(s) |
|---|---|---|---|
 Barry Shipman | Crew | Writing | Screenplay |
Bernard Loftus | Crew | Editing | Editor |
Franklin Adreon | Crew | Writing | Screenplay |
John English | Crew | Directing | Director |
Paul Sawtell | Crew | Sound | Original Music Composer |
Rex Taylor | Crew | Writing | Screenplay |
Ronald Davidson | Crew | Writing | Screenplay |
Sol Shor | Crew | Writing | Screenplay |
 William Lava | Crew | Sound | Original Music Composer |
William Nobles | Crew | Camera | Director of Photography |
 William Witney | Crew | Directing | Director |
 Al Taylor | Cast | Actor | Launch Henchman |
Alan Davis | Cast | Actor | Capt. Link |
Allan Cavan | Cast | Actor | 2nd Warden |
Allen Pomeroy | Cast | Actor | Bayside Dock Thug |
Barry Hays | Cast | Johnson | |
Bernard Suss | Cast | Emissary Lassen | |
Bert LeBaron | Cast | Actor | Thug at Lighthouse |
Bigelow Sayre | Cast | Davis | |
 Bill Nestell | Cast | Actor | Thug in Truck |
Bill Wilkus | Cast | Thug at Hangar | |
Bill Yrigoyen | Cast | Howard | |
Bob Jamison | Cast | Thug at Truck | |
 Bob Terry | Cast | Actor | Benton |
 Broderick O'Farrell | Cast | Actor | Russell |
Bruce Mitchell | Cast | Actor | Prison Guard |
 Bud Geary | Cast | Actor | Ben |
Bud Wolfe | Cast | Actor | Bill / 3rd Ghost Town Thug |
 Budd Buster | Cast | Actor | Cappy |
 Carey Loftin | Cast | Actor | Trooper on Foot |
 Charles Dorety | Cast | Actor | Barge Thug |
 Charles Hutchison | Cast | Actor | Brandon |
 Charles K. French | Cast | Actor | Doctor |
 Charles Murphy | Cast | Actor | Stopes |
Charles Phillips | Cast | Actor | Thug on Barge |
Charles Regan | Cast | Actor | Thug at Dam |
 Charles Sherlock | Cast | Actor | Car 14 Trooper |
 Charles Sullivan | Cast | Actor | Brody |
Curley Dresden | Cast | Thug on Boat | |
Cy Slocum | Cast | Actor | Thug in House |
Dick Rush | Cast | Actor | Police Sergeant |
Earle D. Bunn | Cast | Al | |
 Ed Brady | Cast | Actor | Jonas |
 Ed Cassidy | Cast | Actor | Yacht Captain |
Eddie Cherkose | Cast | Thug in Ghost Town | |
 Eddie Parker | Cast | Actor | Bayside Dock Thug |
 Edmund Cobb | Cast | Actor | Lt. Reynolds |
 Edward Hearn | Cast | Actor | Forest Ranger |
 Edward Peil Sr. | Cast | Actor | Price |
 Ethan Laidlaw | Cast | Actor | Pete |
 Forrest Taylor | Cast | Actor | Mr. Stevens |
Frank Meredith | Cast | Officer Duffy | |
 Frank O'Connor | Cast | Actor | Army Captain |
Fred Schaefer | Cast | Bayside Dock Thug | |
George Allen | Cast | Barge Crewman | |
 George Burton | Cast | Actor | Henchman |
 George Cleveland | Cast | Actor | Gramps Williams |
 George DeNormand | Cast | Actor | Jack |
 George Douglas | Cast | Actor | Henchman Sandoval |
Gilman Shelton | Cast | Joe | |
Harrison Greene | Cast | Actor | Baron |
 Harry Humphrey | Cast | Actor | Warden Stover |
Harry Lang | Cast | Actor | Barossa |
Herman E. Webber | Cast | James Robinson | |
 Irving Pichel | Cast | Actor | Nicolas Zarnoff |
 Jack Kenney | Cast | Actor | Ward |
Jack Raymond | Cast | Actor | Gus Fleming |
Jack Roberts | Cast | Lenny Slade | |
James Cassidy | Cast | Mr. Collins | |
James Fawcett | Cast | Thug in House | |
 Jennifer Jones | Cast | Actress | Gwen Andrews |
Jerry Frank | Cast | Jake | |
 Joe McGuinn | Cast | Actor | Henchman Tom |
Joe Yrigoyen | Cast | Barge Crewman | |
John Locke | Cast | Newscaster | |
John Moloney | Cast | Tim | |
 Josef Swickard | Cast | Actor | Presidente Huenemo Mendoza |
 Joseph Forte | Cast | Actor | Stanton |
 Julian Madison | Cast | Actor | Agent Foster |
Ken Cooper | Cast | Gus | |
Ken Terrell | Cast | Actor | Henchman Ed |
 Kenneth Harlan | Cast | Actor | FBI Chief Clive Anderson [Chs. 13-15] |
 Lee Shumway | Cast | Actor | Burke |
 Lloyd Ingraham | Cast | Actor | Judge Stoddard |
Louis Caits | Cast | Jerry the Human Fly | |
Merrill McCormick | Cast | Actor | Green's Assistant |
Millard McGowan | Cast | Thug at Hangar | |
 Milton Frome | Cast | Actor | Officer |
 Monte Montague | Cast | Actor | Bayside Dock Thug |
 Perry Ivins | Cast | Actor | Emissary Telef |
Peter von Ziegler | Cast | Green | |
 Ralph Byrd | Cast | Actor | Dick Tracy |
Ray Harper | Cast | Martin | |
Ray Johnson | Cast | Phony Gas Station Attendant | |
Raymond Largay | Cast | Actor | FRussell |
 Reed Howes | Cast | Actor | Slim |
Robert Brister | Cast | Dr. Kranz | |
Robert Carson | Cast | Actor | Agent Scott |
Robert Hartford | Cast | Gus | |
Russell Collier | Cast | Police Dispatcher | |
 Sailor Vincent | Cast | Actor | Intern |
 Sammy McKim | Cast | Actor | Sammy Williams |
 Stanley Price | Cast | Actor | Dr. Shang |
Ted Mapes | Cast | Actor | Agent Dan Murchison |
Ted Pearson | Cast | Actor | Agent Steve Lockwood |
 Tom Steele | Cast | Actor | Lighthouse and House Thug |
 Tris Coffin | Cast | Actor | Emissary Zobar (uncredited) |
 Wally West | Cast | Actor | Henchman in Office |
Walter Merrill | Cast | Actor | Junior Officer |
 Walter Miller | Cast | Actor | Henchman Robal |
William Lally | Cast | Actor | Thug in Ghost Town |
William Stahl | Cast | Agent Bruce | |
Robert Wayne | Cast | Agent Wilbur | |
| Person | Type | Job | Role(s) |
