The novel Trouble Shooter was the basis for the movie Union Pacific (1939), directed by Cecil B. DeMille, starring Barbara Stanwyck and Joel McCrea Plot: Frank Peace is a hired gunman and security guard working for the Union Pacific Railroad company known for his temper and severe ways of dealing with those who try to interfere with railway and its progress. His reputation and his deeds have earned him a lot of enemies and one of them in particular, Al Brett, is determined to kill him. Brett announces to Peace the time and the place of when and where he plans to do it which brings his tension to another level. Together with this "small" problem, Peace faces a difficult challenge to choose between two women with affections towards him, fearing the disappointment of each.