A new recruit fresh out of training school makes her mark when she uncovers 12kg of cocaine hidden in a car that she has stopped on one of the bridges.

Vigilant Customs and Border Protection officers uncover 5,000 rounds of ammunition being smuggled across Hidalgo Bridge into Mexico.

Customs and Border Protection officers are stunned when they discover more than $2million of cocaine mixed in with gallons of household paint and bottles of beer.

A Cuban woman crosses the bridge in the hope of being granted political asylum in America, while officers in Laredo stop three students carrying something unusual in their car.

Officers in Brownsville process an American citizen who crossed over the Rio Grande 20 years ago - and discover the reason he didn't want to come back.

Officers pull over a businessman from Mexico who is making a rare journey to the US in a brand new car and a pedestrian gets more than he bargains for when he is mistaken for a wanted man.

Officers are suspicious when an elderly couple arrive from Mexico with five suitcases but no clothes, and a truck carrying garden furniture has something extra in the load.

Officers are on high alert for a cartel ambush as they transfer a Sicario over one of the 28 border bridges and into the custody of the Mexico military. A random inspection of a pick-up truck reveals 32 kilogrammes of narcotics, while a man, his aluminium shed and a broken key brings chaos – then smiles – in Laredo.

In this episode, a shipment of cardboard packaging hides a deadly secret; heroin disguised as a computer laptop baffles the world's most advanced narcotic detection device while the diligence of agriculture specialists pays off – and saves America's forestry from a potentially devastating insect infestation.