Although the original The Walking Dead series has come to an end, its beloved characters aren't totally gone from existence, and in fact, the franchise's many spinoffs have the opportunity to bring back old characters, dead or alive, in series flashbacks. The Walking Dead is a horror drama series based on a series of comic books of the same name written by Robert Kirkman. The show, and its subsequent spinoffs, surround the aftermath of a deadly zombie apocalypse, and in particular, how it affects the human condition.
https://screenrant.com/walking-dead-spinoff-character-returns-flashback-beth-shane-lori/