Upcoming episodes, programme details and where to watch over the next seven days. All times are UK time.
Officers intercept a shipment of hundreds of gun parts headed for Mexico, a nurse is caught smuggling pills in her boots, and a traveller carrying goat meat is inspected.
A tip-off unearths a vast shipment of heroin and cocaine disguised as garbage bags, and officers respond to a medical emergency and deal with a drunken US Marshal.
More than 130 packets of cocaine are found hidden in the seats of a bus, a car explodes in the middle of the bridge, and a retiring officer makes his final bust.
Officers discover fentanyl hidden in the backseat of a car, and two elderly sisters are caught trying to smuggle more than 600 tramadol pills.
Officers make a massive seizure of meth hidden inside fruit crates, a former teacher is taken surprise by a warrant for her arrest, and a Syrian man begs for help.
120 kilograms of cocaine are discovered in the axles of a lowboy trailer, and two men are caught attempting to smuggle a rooster for cock-fighting.
Packages of cocaine are found concealed in the chassis of a bus, officers receive a tip-off about a vehicle loaded with cartel cash, and a magician comes under scrutiny.
A shipment of cocaine is discovered in the fifth wheel of a tractor-trailer, and officers searching a courier van find a cache of firearms.
Officers in Eagle Pass seize over 15 kilograms of heroin and unveil a new cartel drug-smuggling tactic, and a Mexican family in Laredo makes a plea for humanitarian parole.
Officers hand over a convict to Mexican authorities in the middle of the Juarez Lincoln bridge, and a man drops a marijuana joint on a customs floor in Progreso.