Gabriel Hogan

When an enraged gunman takes a hostage in a public square, the team must take drastic action and deal with the consequences.

Insurgents in Sudan attack volunteer doctors -- including the man married to DiNozzo's ex-girlfriend, Jeanne Benoit.

When Amy and Ty convince Sarah, the town recluse, to let them treat her sick horse at Heartland, the family helps her face the ghosts of her past.

While the boys head off on a fishing trip, the girls are left back at Heartland to deal with the havoc caused by a dog, a porcupine and a herd of escaped cows.

Ty struggles to deal with the fact that Amy has found the engagement ring and has to decide how and whether he is going to propose to her or not.

When a mystery horse arrives at Heartland, Amy and Ty are sent down a path that will alter their lives.