A young woman who struggled with an eating disorder and cocaine addiction returns to the show; the fitness model who relied on an artificial heart in a backpack; a simple tip to boost mood that doesn't cost a penny.

The woman whose face was destroyed by botched injections; breast implants slide to the patient's waist; survivors of the San Bernardino terror attack; Cesar Milan and his son Andre stop by with dog training tips; how drug tests can go wrong.