The finale climax also required a lot of time and effort. Building the set of various bright staircases “took roughly six months,” per The Wrap. The actual action required seven days of training from the stunt coordination team. And filming itself “took between seven and 10 days.”

Creator Hwang Dong-hyuk and Emmy winner Lee Jung-jae are back for more death-defying games and nefariously masked villains as the series returns after a three-year absence.