The Narrow Margin
Detective Sergeant Walter Brown (Charles McGraw) of the Los Angeles Police Department and his partner are assigned to protect a mob boss's widow, Mrs. Frankie Neall (Marie Windsor), as she rides a train from Chicago to Los Angeles to testify before a grand jury. She is also carrying a payoff list that belonged to her murdered husband. On the way to pick her up, Brown bets his partner and friend, Sergeant Gus Forbes (Don Beddoe), what she will be like: "She's the sixty cent special. Cheap. Flashy. Strictly poison under the gravy."
As the detectives and Mrs. Neall leave her apartment, they are waylaid by a mob assassin named Densel (Peter Virgo). Forbes is shot to death, but Densel, although wounded by Brown, escapes. At the train station, Brown discovers that he has been followed by gangsters Joseph Kemp (David Clarke) and Vincent Yost (Peter Brocco). The latter meets him on the train and unsuccessfully tries to bribe him.
Brown's relationship with Mrs. Neall is caustic. She is a cynical and flashy brunette, who flirts with him while expressing doubt about his integrity and commitment to protecting her. By chance Brown makes friends with an attractive blonde train passenger he meets, Ann Sinclair (Jacqueline White), and her too-observant young son Tommy (Gordon Gebbert). When Kemp spots Brown with her, he mistakes Sinclair for his target. After Brown beats him up in a fight and questions him, the policeman learns of the mistake. He turns Kemp over to railroad agent Sam Jennings (Paul Maxey) and hurries to warn Ann. Densel, however, has boarded the train during a brief stop at La Junta, Colorado, and waylays Jennings, freeing Kemp.
When Brown tries to warn Ann that she is in danger, she reveals that she is the real Mrs. Neall. The other woman is an undercover policewoman, and Brown was not told in case he might be corrupt. Densel and Kemp enter Brown's compartment to search for the list and discover the fake Mrs. Neall in the next compartment. Densel shoots her dead as she tries to sneak her gun out of her purse. Then Kemp discovers a badge and police identification, identifying her as Chicago PD policewoman Sarah Meggs, hidden within her record player.
Densel, deducing the truth, goes for Ann. He is cornered in the compartment with her, with Brown outside. Brown uses the reflection from the window of a train on the next track to shoot Densel through the door without endangering Ann, then enters the compartment and finishes him off in a shootout. Kemp jumps off the stopped train, but is quickly arrested. Brown escorts Ann from the Los Angeles train station to the grand jury.
cult, suspenseful, murder