Wild Horses

S5 E16: Amy and Ty join Scott on a trip back to his old reservation to save a herd of wild horses from the dangerous EHV-1 virus. While there, Scott must deal with some unfinished business from his past. Meanwhile, Mallory's plans for the perfect sweet sixteen party are interrupted by some life-changing news. And Tim's tumultuous custody battle for Shane and recent break up with Janice send him down a dark and familiar path.