Premiered 26 August 2008. A marine just back from the Middle East, reunites with two high school buddies to form a de facto militia and travel to the U.S./Mexico border in Arizona to attempt to "guard" the country from the "invaders" from the south.

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Season 5

10	Cash and Corruption	16 January 2013
9	Smuggler's Stash	9 January 2013
8	Animals on the Frontline	2 January 2013
7	24-Hour Watch	26 December 2012
6	The War Comes Home	19 December 2012
5	Rio Grande Rookies	12 December 2012
4	Special Ops	5 December 2012
3	War on the Streets	28 November 2012
2	War Games	21 November 2012
1	Traffic	14 November 2012

Season 4

12	Cash in the Tank	24 September 2012
11	Cocaine Dump Truck	17 September 2012
10	Cocaine Paradise	10 September 2012
9	Midnight Drug Trap	3 September 2012
8	Tunnel Smoke-out	27 August 2012
7	Teenage Drug Mules	20 August 2012
6	Cartel Cash Stash	13 August 2012
5	Hidden Tunnel	6 August 2012
4	Contraband Corridor	30 July 2012
3	Meth Mobile	23 July 2012
2	Bullets Over the Border	16 July 2012
1	Rio Grande Reefer	9 July 2012

Season 3

13	River Standoff	27 November 2011
12	Million Dollar Stash	20 November 2011
11	Toxic Drug Tanker	13 November 2011
10	River Under Siege	6 November 2011
9	Going Underground	30 October 2011
8	Contraband Cargo	23 October 2011
7	Cartel Corridor	16 October 2011
6	Murder Capital	2 October 2011
5	Drug-Smuggling Grandma	25 September 2011
4	Smuggler's Tunnel	18 September 2011
3	Marijuana Airdrop	11 September 2011
2	Cocaine Sting	4 Sep 2011
1	Seize and Destroy	4 Sep 2011

Season 2

6	Fog of War
5	Dirty Money
4	Lost in the River
3	Contraband Highway
2	Checkpoint Texas
1	Death on the Rio Grande