More stories from the documentary series that looks at the 28 bridges that cross the notorious Rio Grande, between Texas and Mexico, and provide a gateway for legitimate goods and a lucrative pipeline for illegal contraband, weapons and drugs. 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.

A man fears for his life after being stopped by a cartel in Laredo, clubbers in Detroit are found with drugs disguised in liquid, and officers stop a shipment of frozen rats.