Little did anyone know in 2010 that a post-apocalyptic show based on a comic series would transform into an expansive franchise. Over the years, The Walking Dead became more than just the story of Rick Grimes finding his family in a zombie apocalypse. Strangers came together to help (or sabotage) each other's survival and rebuild society.
Source：https://www.cbr.com/how-to-watch-walking-dead-shows-order/
