In this third season of Borderforce USA: The Bridges, Customs and Border Protection Officers continue seizing record amounts of illegal drugs entering America from the south while trying to stop the relentless flow of laundered cash, military grade firearms and ammunition heading south that the cartels rely on for their continuing power struggle in the border towns on the Mexico side of the mighty Rio Grande. Remains centred on Laredo but expands its coverage to include the Pharr and Progreso ports of entry alongside the recurring crossings in Laredo.

• Dan Nachtrab