In every city, there are people who play by the rules, and people who don’t. Investigative journalist Mariana van Zeller is on a mission to access criminal networks, and she’s taking you with her. From the tiger trade to cocaine creation, join her in a brand new series: Trafficked with Mariana van Zeller. Starts 18th of January on National Geographic UK. | National Geographic UK

Trafficked with Mariana van Zeller is an original documentary series that explores the complex and dangerous inner-workings of the global underworld, black and informal markets. Don't miss the first episode tonight at 9/8c. | National Geographic

Mariana uncovers a lethal supply chain of American firearms being smuggled into the hands of drug cartels and fueling record levels of gun violence in Mexico. Don't miss the two-hour finale of Trafficked with Mariana van Zeller tonight at 9/8c on National Geographic. | National Geographic