In The Walking Dead's Season 1 episode "Days Gone Bye," sheriff's deputy Rick Grimes encounters a badly decayed female walker lying beside a bicycle in a park. Later, he returns to mercifully shoot the walker in the head. Who was this woman? How did she become a walker? AMCtv.com presents The Walking Dead: Torn Apart, a six-episode web series that explores the back story of Hannah, better known as "Bicycle Girl." Watch all six episodes now, and learn about Hannah's life before the apocalypse, her struggle to survive and protect her family and her ultimate demise into zombie-hood.

The Walking Dead returns with a special 90-minute premiere Sun., Oct. 16 at 9/8c on AMC.