1x1 - The Walking Dead: Torn Apart

A young woman wakes up after a violent car accident to find both of her children missing. She searches for them and sees several bodies lying on the ground and finds two walkers feeding on a body. They notice her, and one of them begins to chase after her. She then runs to her ex-husband's house and bangs at the door. The door opens, and her ex-husband is standing in front of her pointing a shotgun down at her. He then raises it and shoots the walker that was following her.