| Person | Type | Job | Role(s) |
|---|---|---|---|
 Barry Shipman | Crew | Writing | Screenplay |
Bob Mark | Crew | Costume & Make-Up | Makeup Artist |
Duke Taylor | Crew | Crew | Stunts |
Earle D. Bunn | Crew | Crew | Stunts |
Edward Todd | Crew | Editing | Editor |
Franklin Adreon | Crew | Writing | Screenplay |
 George DeNormand | Crew | Crew | Stunts |
Helen Thurston | Crew | Crew | Stunts |
Howard Lydecker | Crew | Crew | Special Effects |
James Fawcett | Crew | Crew | Stunts |
John English | Crew | Directing | Director |
Ken Terrell | Crew | Crew | Stunts |
Loren Riebe | Crew | Crew | Stunts |
Rex Taylor | Crew | Writing | Screenplay |
Robert M. Beche | Crew | Production | Producer |
Ronald Davidson | Crew | Writing | Screenplay |
Sol Shor | Crew | Writing | Screenplay |
Ted Mapes | Crew | Crew | Stunts |
Theodore Lydecker | Crew | Crew | Special Effects |
 William Lava | Crew | Sound | Original Music Composer |
William Nobles | Crew | Camera | Director of Photography |
William P. Thompson | Crew | Editing | Editor |
 William Witney | Crew | Directing | Director |
 Al Taylor | Cast | Actor | Al |
Art Fowler | Cast | Sloan | |
 Ben Taggart | Cast | Actor | Dixon |
Bernard Suss | Cast | Dr. Black | |
Bert LeBaron | Cast | Actor | Blake |
 Bill Nestell | Cast | Actor | Pipeline Thug |
Bill Wilkus | Cast | Office Thug / Gas Plant Thug | |
 Broderick O'Farrell | Cast | Actor | D. A. Graves |
 Bruce Bennett | Cast | Actor | Tiny Dawson |
 Bud Geary | Cast | Actor | Mine Thug at Phone |
Bud Wolfe | Cast | Actor | Dognapper-Driver |
Buel Bryant | Cast | Clinic Thug | |
 C. Montague Shaw | Cast | Actor | Dr. Malcolm |
 Carole Landis | Cast | Actress | Blanche Granville |
 Charles Middleton | Cast | Actor | 39013 |
 Charles Quigley | Cast | Actor | Gene Townley |
Charles Thomas | Cast | Sam | |
Corbet Morris | Cast | Klein | |
Curley Dresden | Cast | Powerhouse | |
Cy Slocum | Cast | Actor | Power Thug |
Dave Wengren | Cast | Miner | |
 David Sharpe | Cast | Actor | Bert Knowles |
Dick Scott | Cast | Powerhouse Thug | |
Duke Taylor | Cast | G-Man | |
Earl Askam | Cast | Actor | Lutens |
Earle D. Bunn | Cast | Derrick Thug | |
 Earle Hodgins | Cast | Actor | Hinkle--Barker |
Eddie Cherkose | Cast | Burton | |
 Eddie Foster | Cast | Actor | Zeke |
 Eddie Parker | Cast | Actor | Pete--Derrick Heavy |
 Edmund Cobb | Cast | Actor | Oil Field Foreman |
Forrest Dillon | Cast | Kid | |
Frank Wayne | Cast | Dan | |
 Fred 'Snowflake' Toones | Cast | Actor | Snowflake |
Fred Schaefer | Cast | Oil Thug | |
 George Chesebro | Cast | Actor | Sheffield |
George DeNormand | Cast | Actor | G-Man |
George Plues | Cast | Actor | Ted--Gas Plant Heavy |
 Harry Anderson | Cast | Actor | Ward |
 Harry Strang | Cast | Actor | Peck |
Jack Chapin | Cast | Joe--Gas Plant Heavy | |
 Jack Kenney | Cast | Actor | Steve |
James Fawcett | Cast | Man | |
Jerry Frank | Cast | Dognapper | |
Jerry Jerome | Cast | Marco | |
 Joe McGuinn | Cast | Ed | |
Joe Yrigoyen | Cast | Power Thug | |
 John Merton | Cast | Actor | Davis--Gas Plant Heavy |
Ken Terrell | Cast | Actor | Gas Plant Thug |
Lee Frederick | Cast | Bob | |
 Lloyd Whitlock | Cast | Actor | Doctor |
Loren Riebe | Cast | Derrick Thug | |
 Michael Jeffers | Cast | Actor | G-Man |
 Miles Mander | Cast | Actor | Horace Granville |
Millard McGowan | Cast | Man | |
 Monte Montague | Cast | Actor | Tom |
Norman Nesbitt | Cast | Actor | Newscaster |
 Oscar 'Dutch' Hendrian | Cast | Actor | Tank Heavy |
Ray Miller | Cast | Jeff | |
 Raymond Bailey | Cast | Actor | Stanley |
Raymond Largay | Cast | Actor | Police Commissioner |
 Reed Howes | Cast | Actor | Derrick Thug |
 Reginald Barlow | Cast | Actor | Doctor in Hospital |
 Robert J. Wilke | Cast | Actor | G-Man |
Robert Robinson | Cast | Actor | Al--Chemist |
Robert Winkler | Cast | Actor | Sammy Townley |
 Roy Barcroft | Cast | Actor | Mine Superintendent |
Roy Brent | Cast | Actor | Bill |
 Sailor Vincent | Cast | Actor | Miner |
 Stanley Price | Cast | Actor | Prof. Selden |
Ted Mapes | Cast | Man | |
Trudy Marson | Cast | Nurse Benson | |
 Wally West | Cast | Actor | Thug at Selden's Lab |
Walter Merrill | Cast | Actor | Pete #2 |
William Pagan | Cast | Police Chief Landon | |
 Yakima Canutt | Cast | Actor | G-Man |
Max Marx | Cast | Tank Heavy | |
George Turner | Cast | Actor | Oil Thug |
Dee Dodd | Cast | Actress | Kid |
 Howard M. Mitchell | Cast | Actor | Police Dispatcher |
Forrest Burns | Cast | Mac--Gas Plant Heavy | |
Bob Thompson | Cast | Powerhouse Thug | |
 Tuffy | Cast | Tuffie (as Tuffie the Dog) | |
| Person | Type | Job | Role(s) |
