Contraband: Seized at the Border

A shipment of cardboard packing supplies hides a lethal secret, and a laptop computer bag conceals a narcotic that even advanced technology has trouble identifying. Agriculture specialists prevent a deadly pest from entering the country.

Agricultural inspectors intercept nearly 50 gallons of illicit moonshine. A former cartel hitman is extradited back to Mexico. A random vehicle inspection turns up a major seizure. A woman is caught attempting to smuggle prescription meds.

New officers entering the ranks are put through their paces, and one rookie proves her worth. A couple from Mexico arrives with candy unfit for children's consumption. A van full of household furniture attempts to cross, but it hides an illicit surprise.

A new officer makes one of the biggest drug busts her bridge has ever seen. A group of biology students returning from Mexico is carrying something unexpected in their trunk. A pedestrian attempts to conceal something valuable under his clothing.

Officers see a trend of narcotics being smuggled inside car dashboards. A teenager's tattoos send up red flags. A surprising load is found in a train car. A teenager attempting to cross the border is flagged as having an outstanding arrest warrant.

An officer catches a woman trying to use a forged visa to enter the US. A rookie officer takes part in a major cocaine seizure. Officers suspect a traveler claiming to be a pastor on the way to a religious conference may not be who he says he is.

K9s save the day, identifying gallons of paint and beer bottles filled with more than the officers bargained for. A man with a warrant for his arrest is concealing something suspicious within his car. Officers question the intentions of a chatty traveler.

An elite team prepares for the extradition of a cartel Sicario, or hitman wanted for murder in his home country. With the sale of guns and ammo strictly controlled in Mexico, cartels turn to America for the weapons to wage their wars.

A traveler gets more than he bargains for when he is mistaken for a wanted man. Agriculture specialists deal with a shipment of cattle arriving without the required seal. Officers are suspicious when a businessman arrives in a brand-new car.

When night falls, a different type of traveler crosses the border -- and cartel spotters are nearby watching. A truck driver's modified cab is carrying a secret commodity. Officers find a surprise in a car that has never crossed the border before.