“Kingdom: Ashin of the North” (킹덤: 아신전)
“Ashin of the North” is screenwriter Kim Eun-Hee’s concession to “Kingdom” fans, who are eagerly awaiting the third season of the popular Netflix series. This stand-alone episode — or film, depending on how you view it — is entertaining, but not nearly of the same caliber of storytelling as the first two seasons of this zombie period piece.