ET's Ash Crossan gives a behind-the-scenes tour of 'Squid Game: The Challenge.' Inspired by the hit South Korean survival drama, the 10-episode competition series puts 456 players through a series of games in pursuit of a $4.56 million prize. Executive producers Nicola Brown and Tim Harcourt explain how they built the massive production, including multiple real-life versions of the show's iconic sets. 'Squid Game' creator Hwang Dong-hyuk tells ET what advice he gave the adaptation makers, then shares a pro-tip for winning Red Light, Green Light. 'Squid Game: The Challenge' premieres Nov. 22 on Netflix.