Trailer
 | Tristram Coffin as Prof. Jeff King |
 | Mae Clarke as Glenda Thomas |
 | Don Haggerty as Tony Dirken |
 | House Peters Jr. as Burt Winslow |
 | James Craven as Prof. Millard |
 | I. Stanford Jolley as Prof. Bryant |
 | Ted Adams as Martin Conway |
 | Marshall Bradford as Dr. Graffner |
 | Stanley Price as Gunther von Strum |
 | Douglas Evans as Civil Defense Chairman |
 | Arvon Dale as Chairman's Aide |
| Tom Steele as Henchman |
 | Dale Van Sickel as Henchman |
 | David Sharpe as Henchman |
 | Carey Loftin as Henchman |
| Bud Wolfe as Henchman |
 | Frank O'Connor as Old Watchman |
 | Art Gilmore as Radio Voice |
| Directing | |
| Fred C. Brannon | Director |
Writing | |
| Royal K. Cole | Writer |
| William Lively | Writer |
| Sol Shor | Writer |
