| Person | Type | Job | Role(s) |
|---|---|---|---|
 Dolph Thomas | Crew | Sound | Sound |
Doug Gould | Crew | Editing | Editor |
Howard Shoup | Crew | Costume & Make-Up | Costume Design |
 Noel M. Smith | Crew | Directing | Director |
Raymond L. Schrock | Crew | Writing | Screenplay |
Ted D. McCord | Crew | Camera | Director of Photography |
Ted Smith | Crew | Art | Art Direction |
W. H. Moran | Crew | Writing | Other |
Al Lloyd | Cast | Actor | Convict Bartell |
 Alberto Morin | Cast | Actor | Pedro the Bartender |
 Anthony Averill | Cast | Actor | Lead Henchman Hafer |
 Bernard Nedell | Cast | Actor | Earl 'Ace' Hemrich |
 Carlyle Moore Jr. | Cast | Actor | Glendale Radio Operator |
Cliff Saum | Cast | Actor | Alien - First Flight |
 Davison Clark | Cast | Actor | Deputy Warden |
Don Turner | Cast | Actor | Agent Harper |
Duke Green | Cast | Actor | Second Tough in Bar Fight |
 Eddie Foy Jr. | Cast | Actor | Gabby Watters |
 Eddy Chandler | Cast | Actor | Capt. King - Highway Patrol |
 Edgar Edwards | Cast | Actor | Convict Crowley |
Eumenio Blanco | Cast | Actor | Mexican Businessman in Bar |
 Frank M. Thomas | Cast | Actor | Doc |
 Frank Mayo | Cast | Actor | Treasury Agent Manning |
George Sorel | Cast | Actor | Capt. Cortez - Mexican Police |
 Glen Cavender | Cast | Actor | Waiter |
Hal Craig | Cast | Actor | Ground Superintendent |
Harry Hollingsworth | Cast | Guard | |
Henry Otho | Cast | Actor | The Turnkey |
 Herbert Rawlinson | Cast | Actor | Adm. A.C. Schuyler |
 Ila Rhodes | Cast | Pamela Schuyler | |
Jack A. Goodrich | Cast | Actor | Border Patrol Co-Pilot |
 Jack Mower | Cast | Actor | Treasury Agent Aldrich |
Jack Wise | Cast | Actor | Ivan's Alien Pal |
 James Stephenson | Cast | Actor | Jim Cameron |
 Jeffrey Sayre | Cast | Actor | Road Gang Guard |
Joe Cunningham | Cast | Actor | Agent Dawson |
 John Hamilton | Cast | Actor | Warden Jackson |
 John Harron | Cast | Actor | Agent Cliff Durell |
 John J. Richardson | Cast | Actor | Alien - First Flight |
 John Litel | Cast | Actor | Chief Agent Tom Saxby |
 John Ridgely | Cast | Actor | Joe LeRoy |
John Sinclair | Cast | Actor | First Tough in Bar Fight |
 Lane Chandler | Cast | Actor | U.S. Border Patrol Officer |
 Larry Williams | Cast | Actor | Dick Wayne |
 Morgan Conway | Cast | Actor | Henchman Ed Powell |
 Nat Carr | Cast | Actor | Drunk at Bar |
 Pat O'Malley | Cast | Actor | Guard Cooper |
 Paul Panzer | Cast | Actor | Ivan - an Alien |
 Pierre Watkin | Cast | Actor | Chief of the Secret Service |
 Raymond Bailey | Cast | Actor | Henchman Starting Fight [script name: Klune] |
 Richard Bond | Cast | Actor | Buzzy - San Francisco Radio Operator |
 Ronald Reagan | Cast | Actor | Lt. 'Brass' Bancroft |
 Rosella Towne | Cast | Actress | Zelma Warren |
 Sidney Bracey | Cast | Actor | John 'Joe' Vicary |
 Sol Gorss | Cast | Actor | Border Patrol Pilot |
 Stuart Holmes | Cast | Actor | Agent Gowing |
Dave Roberts | Cast | Highway Police Announcer (voice) | |
| Person | Type | Job | Role(s) |
