Get ready for an adrenaline-fueled ride into the world of crime as National Geographic's acclaimed investigative series, "Trafficked Underworlds with Mariana van Zeller," returns for its highly anticipated fourth season. Premiering on Thursday, May 23 at 9:00 PM CAT on National Geographic (GOtv 101), this Emmy-nominated docu-series promises to take viewers on a thrilling exploration of the global illicit trade. Each episode delves into the dark and dangerous world of clandestine networks, revealing the shocking realities of modern-day criminal enterprises.

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Led by renowned investigative journalist Mariana van Zeller, the series plunges into the shadows of illicit networks involved in assassinations, sextortion, illegal trade of body parts, black market medicine, ape trafficking, migrant smuggling, illegal gambling, drug muling, and terrorist financing. Throughout the season, van Zeller fearlessly traverses continents, from Los Angeles to South Africa, the Philippines, Congo, Mexico, India, Morocco, Europe, Mozambique, and beyond. With unparalleled access, she confronts the individuals driving these lucrative operations, shedding light on their devastating impact on victims and communities.

With five News and Documentary Emmy nominations and critical acclaim, "Trafficked Underworlds with Mariana van Zeller" continues to redefine investigative journalism. Produced by Muck Media, the series is helmed by executive producers Mariana van Zeller, Darren Foster, and Jeff Plunkett, with Bengt Anderson and Sean D. Johnson serving as executive producers from National Geographic. Prepare to be captivated by this thrilling journey into the depths of organized crime as the series unveils the underworld's darkest secrets and the human stories intertwined with them.