S4 E1 • Bullets Over the Border

Agents respond to a shoot-out on the Rio Grande; a stash of cocaine hidden in a car floor.

Première diffusion : 9 juillet 2012

S4 E2 • Meth Mobile

The agents enlist the help of the A-Star surveillance helicopter to track a suspected smuggling ring.

Première diffusion : 16 juillet 2012

S4 E3 • Contraband Corridor

A large stash of cocaine is discovered in a unique hiding place; millions of dollars of heroin is seized at port.

Première diffusion : 23 juillet 2012

S4 E4 • Rio Grande Reefer

Human smugglers and the drug cartels use the Rio Grande River as a route to cross the border with their contraband.

Première diffusion : 30 juillet 2012

S4 E5 • Hidden Tunnel

The flow of illegal immigrants and drugs; Border Patrol's campaign for new methods to avoid detection.

Première diffusion : 6 août 2012

S4 E6 • Cartel Cash Stash

Cartels with nearly $1 million in cash and drugs; crystal meth in a war veteran's SUV; decoy bundles.

Première diffusion : 13 août 2012

S4 E7 • Fence Jumpers

An illegal immigrant chase; new crossing and concealment strategies.

Première diffusion : 20 août 2012

S4 E8 • Tunnel Smoke-out

A getaway car smuggling drugs; illegal immigrants led by a human smuggler; a hidden tunnel in a house.

Première diffusion : 27 août 2012

S4 E9 • Midnight Drug Trap

Agents set up a trap in an area of the Arizona desert known as "The Jungle"; agents discover a major drug-running tunnel.

Première diffusion : 3 septembre 2012

S4 E10 • Cocaine Paradise

In Puerto Rico, agents try to keep a drug seizure for transport to San Juan; a suspected drug smuggler enters Puerto Rico from the Dominican Republic.

Première diffusion : 10 septembre 2012

S4 E11 • Cocaine Dump Truck

An undercover "buy and bust" operation in Puerto Rico; agents race to find illegal immigrants who have landed on a secluded beach.

Première diffusion : 17 septembre 2012

S4 E12 • Cash in the Tank

The open coastline of Puerto Rico is used as a springboard into the U.S. by drug traffickers and contraband dealers

Première diffusion : 24 septembre 2012