1. The Telltale Ledger

Officers discover bundles of cocaine hidden inside the wheel wells of an SUV, and two retirees are caught trying to smuggle weight loss medication across the border.

2. Deserter

Officers discover a fuel tanker with bundles of cocaine hidden in the cab, and three men with fake IDs and a gruesome video of a murder on their phones are questioned.

3. Diamond Fever

Officers intercept a truck with methamphetamine hidden inside a fuel tank, and a courier is caught trying to smuggle envelopes filled with diamonds.

4. Fish Bladders and Assault Rifles

Documentary with unrestricted access to America's Customs and Border Protection working on the bridges that separate Texas and Mexico.

5. Strange Cookies

Officers intercept an 18-wheeler carrying a load of narcotics into Canada, and banned fruit and veterinary medicines are found hidden in a pick-up truck.

7. Cut-Price Potency Pills

Officers find $6.5 million of cocaine in a secret compartment in a bus fuel tank, and a man is spotted putting something into his shoes - but what is he hiding?

8. A Chassis Full of Meth

Officers find 70 packets of methamphetamine hidden in the floor of a woman's car, and a young boxer is detained over an outstanding warrant for evading arrest.

9. The Stand-Up Comedian

A stand-up comedian is no longer laughing after discovering the medication he bought in Mexico contains lethal fentanyl, and officers find a gun and ammunition on a bus.

10. Life-Threatening Delivery

A 'body carrier' is caught carrying narcotics strapped to his back, and a courier is in trouble when what appears to be ammunition and a firearm are discovered in his cargo.

11. A Divine Test

Officers find 11kg of meth concealed in a spare tire, and a woman returning from Mexico tries to cross the border with four times the amount of Tramadol than is allowed.

12. In the Name of Alfonso

A woman is caught concealing thousands of prescription diet pills in her car, and officers investigate a pick-up truck with a suspicious film covering the license plate.