Government officials discover a horrible plot: the Chinese are tunneling their way to the United States.
Charles F. Vetter | Screenplay |
Charles F. Vetter | Story |
Montgomery Tully | Director |
Gerry Turner | Sound Recordist |
A.W. Watkins | Recording Supervision |
Pat Kelly | Assistant Director |
J.B. Smith | Sound Recordist |
Jim Morahan | Art Direction |
Tom Howard | Special Effects |
Kenneth Talbot | Director of Photography |