Directed by
| David Howard | ||
Writing Credits
| Charles Furthman | ... | (story) |
| Daniel Jarrett | ... | (screenplay) and |
| Raymond L. Schrock | ... | (screenplay) |
Cast (in credits order) complete, awaiting verification
| George O'Brien | ... | Tim 'Hard Rock' Harrigan | |
| Irene Hervey | ... | 'Andy' Anderson | |
| Fred Kohler | ... | Black Jack Riley | |
 |
Dean Benton | ... | Michael McGinnis |
| Frank Rice | ... | McClintock - Superindendant | |
| Victor Potel | ... | 'Big' Oscar | |
| Olin Francis | ... | Clancy | |
| William Gould | ... | Clark | |
|
|
George Humbert | ... | Columbo |
| David Clyde | ... | McNally | |
|
|
Edward Keane | ... | Dr. Wagner |
| Lee Shumway | ... | Casey | |
| Rest of cast listed alphabetically: | |||
| Jack Hendricks | ... | Worker (uncredited) | |
| Jack Kirk | ... | Worker (uncredited) | |
| Walter McGrail | ... | Worker (uncredited) | |
|
|
Lee Phelps | ... | Train Conductor (uncredited) |
| Glenn Strange | ... | Worker (uncredited) | |
Produced by
| Sol Lesser | ... | producer |
| John Zanft | ... | producer |
Cinematography by
| Frank B. Good | ||
Editing by
| Donald Barratt | ||
Art Direction by
| Robert Ellis | ||
Costume Design by
| Royer | ||
Production Management
| Edward Gross | ... | production manager |
Second Unit Director or Assistant Director
| Theodore Joos | ... | assistant director |
Sound Department
| L.E. Clark | ... | sound recordist |
Music Department
| Hugo Riesenfeld | ... | music arranger |
Additional Crew
| Sol Lesser | ... | presenter |
| John Zanft | ... | presenter |
