Government officials discover a horrible plot: the Chinese are tunneling their way to the United States.
| Directing | Montgomery Tully | Director |
| Writing | Charles F. Vetter | Screenplay |
| Writing | Charles F. Vetter | Story |
| Production | Charles Reynolds | Producer |
| Production | Charles F. Vetter | Executive Producer |
| Sound | Ken Jones | Music |
| Camera | Kenneth Talbot | Director of Photography |
| Art | Jim Morahan | Art Direction |
| Production | Ronnie Bear | Production Manager |
| Directing | Pat Kelly | Assistant Director |
| Sound | J.B. Smith | Sound Recordist |
| Sound | Gerry Turner | Sound Recordist |
| Sound | A.W. Watkins | Recording Supervision |
| Crew | Tom Howard | Special Effects |
| Camera | Alan McCabe | Camera Operator |
| Editing | Sidney Stone | Supervising Editor |
