TV Guide National Geographic Channel Saturday

Anti-drug agents and law enforcement officers in a Peruvian airport encounter several suspects and accomplices who are accused of smuggling crimes.

After a candy-colored pill becomes popular in Thailand, it crowds out the market and becomes the most used drug in the country; bonus features are included.

Detailed information is shared about the drug trade and prevalent use of hash in countries around the world; bonus features are included.

A detailed look is taken into the underworld revolving around the production, trade and use of ecstasy; bonus features are included.

Details are shared about designer drugs, including how they have become the focus for authorities who are waging a war on narcotics; bonus features included.

Details are shared about the drug trade that hides in Vancouver's suburbs to reveal the corresponding gang rivalry that has emerged; bonus features included.

Mariana investigates the black market for shark fins, known as finning, which is a multi-million dollar illegal trade driven by demand for shark fin soup.

Mariana van Zeller investigates the explosive world of armored car heists.

Mariana investigates the dirty business of substance addiction treatment scams, where unethical marketing practices are putting vulnerable patients at risk.

Mariana investigates the growing influence of heavily armed militias, private, often paramilitary, groups motivated by a desire to protect perceived threats.

U.S. Customs and Border Protection seizes counterfeit medications; Homeland Security Investigations pursues a series of maritime smuggling cases.

United States Customs and Border Protection cracks down on party drugs, prostitution, and counterfeit goods during the Super Bowl.

Homeland Security Investigations arrests a suspected trafficker of illegal weapons; U.S. Customs and Border Protection hunt for liquid drugs.

Homeland Security Investigations surprises a potential cocaine dealer while outside of a fast-food restaurant in Brooklyn, N.Y.

Hidden among the millions who enter the U.S. through JFK, MIA and ATL is dangerous contraband; the DHS will stop at nothing to catch these smugglers.

Homeland Security Investigations investigates cocaine that are concealed in cakes; U.S. Customs and Border Protection cracks down on contraband cash.

Homeland Security Investigations conducts a controlled delivery of methamphetamine; the U.S. Customs and Border Protection deals with an unruly passenger.

Homeland Security Investigations disrupt a transnational meth ring; U.S. Customs and Border Protection seize a huge shipment of illegal shark fins.

Travelers are reunited with lost treasures, including an expensive pair of vintage Air Jordans, sweaty boxing gear and a stuffed animal.

Lost-and-found workers desperately try to find the owner of a fanny pack as it contains much-needed medication and $3,000 in cash.

Viewers see what happens to all the lost things at airports, from the weird to the wonderful, including items that are left behind at TSA security checkpoints.

Travelers are reunited with lost treasures, including an expensive pair of vintage Air Jordans, sweaty boxing gear and a stuffed animal.

Lost-and-found workers desperately try to find the owner of a fanny pack as it contains much-needed medication and $3,000 in cash.

Customs & Border Protection in JFK International Airport and San Diego Homeland Security Investigations tackle fentanyl crisis on opposite coasts.

Homeland Security Investigations organize money laundering stings; Customs and Border Protection has its largest drug seizure in Los Angeles Airport's history.

HSI helps the Colombian National Police take down an illegal gold-mining ring; CBP finds an almost $1.5 million cartel drug haul at the RGV port in Texas.

U.S. Customs and Border Protection's K9s sniffs out hidden cash; U.S. Department of Homeland Security Investigations intercepts a $2 million drug deal.