 FACT: Throughout the movie, each time the Chicago Metra train  pulled into Union Station, the pa announcer kept saying that it was  the end of the red line. The CTA (Chicago Transit Authority) uses  color coded routes, and the Metra system uses actual named routes  (Metra Milwaukee District North). Also, the view of the train  entering the city shows it entering from the south, but Charles  briefcase tag says he lives in Wilmette which is north of the city.