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.

A desperate father turns a policeman's gun on a surgical team, demanding a heart transplant for his dying daughter.

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.

Jeremy forces Amy to make a tough decision about Phoenix when his horse, Buckingham, sustains a serious injury that threatens his jumping career.

Amy and Ty hold off telling the family their great news when they return from their trip to find everyone reeling from the devastating fire at Lou and Peter's home.