Drug Wars

A group of cartel traffickers set out to move a drug load through the desert under the cover of darkness, while the elite tactical unit BORTAC rushes to the site of the action to attempt a dangerous nighttime interdiction.

Border Patrol agents along the legendary Rio Grande hunt down Mexican drug smugglers who are moving large stashes across the border. In addition, cartels branch into human trafficking, exploiting a wave of migrants fleeing Central American violence.

Custom and Border Protection in Nogales, Ariz., look to intercept drugs hidden in vehicles. And in Rio Grande City, Texas, the hunt is on when a group of cartel traffickers attempt to smuggle hundreds of pounds of narcotics across the river and into the U.S.

Border Patrol agents working along one of the most dangerous drug routes in the Southwestern United States are in a race against the clock to find traffickers before they vanish into the desert when Season 3 begins.

"Five Dollar Insanity" hits South Florida, a new synthetic drug that's wrecking the streets. Also: A St. Louis heroin addict named Cody has second thoughts about boarding a plane to the Sunshine State for rehab.

An expanded investigation into a suspected heroin dealer who has so far dodged the St. Louis DEA at every turn is followed. Also: As a heroin epidemic hits America, young addicts embark on the battle of their lives.

DEA agents in St. Louis tackle a growing heroin epidemic...one dealer at a time. Plus, law enforcement pulls out every stop to reverse the city's culture of drugs and the violent crime it generates.

The Falfurrias checkpoint in South Texas cracks down on traffickers, while Border Patrol's Search and Rescue team BORSTAR races against the clock to save the lives of one group of migrants abandoned in the scorching desert by their cartel smugglers.

Law enforcement and fire rescue in Broward County, Fla., tackle a daily onslaught of flakka cases, each more unusual than the last. Also: A Fort Lauderdale addict named Glenn undertakes what may be his last chance at recovery.

A night of keeping a close watch on drug smugglers in South Texas takes an unexpected turn.

U.S. Border Patrol agents in Nogales, Ariz., chase undocumented aliens who've jumped the fence. Also: An investigation is launched into a suspicious man who might be smuggling money or guns back into Mexico.

A search warrant is executed on a suspected drug dealer by a SWAT team in Miramar, Fla. Meanwhile, U.S. Custom and Border Protection agents seize an alarming amount of drugs in Miami's International Mail Center.

The battle against drug traffic moves belowground to the narco-tunnels of Nogales, Ariz. But then night falls, and Border Patrol races to respond when cartels take the fight aboveground.

Law enforcement in South Florida screen airport travelers, eventually intercepting Latin American drug smugglers; and off the coast of Miami, federal agents pursue traffickers who are moving drugs from the Bahamas.

Mexican cartels exploit an old migrant route that's thick with brush to traffic drugs across the Rio Grande. Elsewhere, in Nogales, Ariz., law enforcement work around the clock to counter the endlessly inventive techniques for smuggling drugs.

A resurgence of cocaine smuggling puts the Port of Miami on high alert; and a SWAT team from Miramar, Fla., execute a search warrant on a local drug dealer who's suspected to be heavily armed.