Contraband: Seized at the Border

When night falls, a different type of traveller 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.

A traveller 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.

An elite team prepares for the extradition of a cartel Sicario, or hit man 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.

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; officers question the intentions of a chatty traveler.

An officer catches a woman trying to use a forged visa to get into the US; a rookie officer takes part in a major cocaine seizure; officers suspect a traveller claiming to be a pastor on the way to a religious conference may not be who he says he is.

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.

A new officer makes one of the biggest drug busts her bridge has ever seen.

A couple from Mexico arrives with candy unfit for children's consumption.

A cartel hitman is extradited, and 50 gallons of moonshine is intercepted.

Cardboard packaging hides a secret; a laptop bag conceals narcotics.