TCM gave this four stars. It's a 2-1/2 stars film, in my opinion.
Pat O'Brien is Sam Gallagher, a U.S. government agent, a step up from his old job as a foreign correspondent. His brother Jeff (Chester Morris) offers him a job working in a shipyard as a pileback. Piles are poles, driven into the soil by a mechanical device to give a foundation to a structure Sam's purpose is to ferret out a group of Nazi spies trying to sabotage the shipyards. To give him a background, Jill McCann (Carole Landis), who is an FBI agent, poses as his wife, and two small war orphans are brought in as his children.
Jeff is surprised by all this - okay, he hasn't seen his brother in seven years, but something isn't right. He tells Lea Damoran (Ruth Warrick, his girlfriend who used to be Sam's girlfriend) his thoughts.
Sam is able to find out that the yard is going to be blown up the yard while an aircraft carrier is docked. And he begins to learn who the Nazis are in the yard. One problem: His brother's suspicions are drawing too much attention to Sam.
Pat O'Brien for me has never made it as a leading man, yet for some reason, every once in a while he was given a lead role. This is a role for Joel McCrea, John Wayne, that ilk: masculine, solid, and, frankly, kind of a chick magnet. I mean, on one side there's gorgeous Carole Landis, and on the other, his old girlfriend who still has feelings for him.
The story is only so-so, but the final scenes are quite good. The subplot concerning the war orphans is sweet and probably unnecessary.
Carole Landis would be dead only four years later, at the age of 29. I suspect the affair with Harrison was probably the last straw. She was done in Hollywood: she was nearing 30, the cutoff age for actresses back then, there were no more big films thanks to her relationship with Darryl Zanuck ending, she couldn't have children, and at the age of 29, she had already had four husbands. A sad end for a beautiful woman who learned that in Hollywood, you're disposable.