Documentary short film explaining the need for secrecy in the exchange of sensitive government information, so as to prevent sabotage or subversion of the American war effort.
| Actor | Role |
|---|---|
 Jim BannonTom Blair | Tom Blair |
 Jeanne BatesMrs. Tom Blair | Mrs. Tom Blair |
 William HaadeSergeant | Sergeant |
| TTom HanlonRadio Broadcaster | Radio Broadcaster |
 Milton KibbeeTrain conductor | Train conductor |
 Syd SaylorMr Niblick | Mr Niblick |
 Ann ShoemakerMrs Nelson | Mrs Nelson |
 Harry StrangRailroad engineer | Railroad engineer |
 John TyrrellLoose-lipped citizen | Loose-lipped citizen |
 Robert B. WilliamsBartender | Bartender |