Just before America's involvement in World War II, Ben Fallon, a popular newscaster for radio station WECA of the United Broadcasting System, thinks he might be beginning to unravel the growing story behind mysterious attacks on American infrastructure. Suspecting fifth-columnists, he begins to mix personal opinion into his newscasts, saying that stronger official steps need to be taken to halt the growing danger. But broadcast management (fearing censure by the Federal Communications Commission) confronts Fallon, saying he's overstepping his journalistic bounds and becoming inflammatory by opinionizing during his newscasts.
As friction mounts, revelations come forth from a tipster that a famous American might be connected to the destructive episodes. But the informant is found murdered, and when Pearl Harbor is attacked the reporter's investigations intensify, much to the consternation of his employers who keep insisting on only straightforward reporting of known facts, not conjecture.
'Stand By All Networks' wastes no words or actions painting a concise portrait of complacent isolationist America just before and after the sudden Pearl Harbor attacks and, as the story progresses, you'll be reminded of another attack on America nearly sixty years later.