It had been said that the Pine-Thomas production unit never lost money for Paramount Pictures. Even without major star names to carry the box-office weight, Pine-Thomas' Special Agent managed to post a tidy profit. William Eythe stars as Johnny Douglas, an operative of the combined railroads' special-agent division. While encamped in a small California town, Douglas takes on the villainous Devereaux brothers (George Reeves and Paul Valentine), who pull off a big-time payroll train heist. Heroine Lucille Peters, whose father is killed in the robbery, is played by Laura Elliot, who later portrayed the bespectacled murder victim in Hitchcock's Strangers on a Train--and who, as Kasey Rogers, went on to appear as Mrs. Larry Tate on TV's Bewitched. Most of Special Agent is filmed on location, adding authenticity to the melodramatic goings-on.