Cast (in credits order) complete, awaiting verification
| Bela Lugosi | ... | Dr. Alex Zorka (archive footage) | |
| Robert Kent | ... | Capt. Bob West (archive footage) | |
| Dorothy Arnold | ... | Jean Drew (archive footage) | |
| Edwin Stanley | ... | Dr. Fred Mallory (archive footage) | |
| Regis Toomey | ... | Lt. Jim Daley (archive footage) | |
 |
Jack C. Smith | ... | Monk (archive footage) |
| Edward Van Sloan | ... | Jarvis (archive footage) | |
| Dora Clement | ... | Ann Zorka (archive footage) | |
| Anthony Averill | ... | Rankin (archive footage) | |
|
|
Hugh Huntley | ... | Perkins (archive footage) |
| Monte Vandergrift | ... | Jarvis Goon (archive footage) | |
| Frank Mayo | ... | West's Boss (archive footage) | |
| Jim Farley | ... | Harbormaster (archive footage) (as James Farley) | |
| Eddie Acuff | ... | Mac (archive footage) | |
| Ed Wolff | ... | The Robot (archive footage) | |
| Rest of cast listed alphabetically: | |||
| Roy Barcroft | ... | Parker (archive footage) (uncredited) | |
| Lee J. Cobb | ... | Road Crew Foreman (archive footage) (uncredited) | |
| Charles King | ... | Car-Crash Cop (archive footage) (uncredited) | |
Produced by
| Henry MacRae | ... | associate producer: archive footage |
Additional Crew
| Lyonel Margolies | ... | dialogue director: archive footage |
| Ford Beebe | ... | director: archive footage (uncredited) |
| Saul A. Goodkind | ... | director: archive footage (uncredited) |
