'Squid Game' Cast Explains Surprising Story Behind Terrifying 'Red Light Green Light' Doll

The "Squid Game" cast is well aware just how terrifying that Red Light Green Light doll really is. The stars of the smash Netflix series joined Jimmy Fallon on Wednesday's "The Tonight Show" and explained the origin of the ominous, giant robot girl from the first episode. Though the show introduced many American viewers to the character for the first time, turns out it's a staple of Korean childhood – and there's actually more than one!