Netflix's latest offering from Korea, the sci-fi thriller series Hellbound created by acclaimed director Yeon Sang-ho, has already become the top non-English language series globally for the streamer, currently just ahead of Squid Game. Its creator is best known internationally for having directed the huge horror zombie hits 2016's Train to Busan and 2020's Peninsula. Now, Yeon has teased a potential third installment in the zombie trilogy.