The southwest border of the U.S. is the main gateway for illegal drugs, and Dallas, Texas, is often the first port of call for the Mexican cartel drug trade. In this episode, witness how the Mexican cartels have tainted Dallas by turning it into their command and control center for the trade of their narcotics. Buyers desperate to get a hold of the cartel's high-quality product flock to Dallas from all over the country, giving local dealers the chance to make big money (thetvdb.com)