The Walking Dead: The Oath is a three-part web series based on the television series The Walking Dead. It aired in its entirety on October 1, 2013, on AMC's official website. This series tells the origin of the "Don't Open, Dead Inside" paint on the cafeteria doors of the hospital Rick Grimes awakes in, post-apocalypse. It follows Paul and Karina as they escape their zombie-overrun camp in search of a medical station. The central theme of the series examines the will to persevere in the face of inevitable death.