Animals on the Frontline

S5, E8: The horses - fast, maneuverable and strong - help apprehend groups of illegal immigrants galloping through terrain that is tough even for agents on ATV, let alone on foot. The dogs - obedient and tenacious - use their acute sense of smell to track suspects in the brush for miles, detect drugs and humans stashed in vehicles trying to cross the border, and stop drugs in the border towns from making their way further north. We follow agents and their animal partners as they work tirelessly for Border Patrol and border town police departments, proving that the men and women working to protect the border couldn't be as effective without the help of these animals in action.