Il-nam’s true identity: the first clue
The revelation that sweet old man Oh Il-nam was the mastermind behind the twisted games was perhaps the biggest plot twist of the drama, but there were several hints leading to his true identity.
For example, when they were playing Red Light, Green Light and everyone was terrified after learning how losers were eliminated, Il-nam was the first to get into the game with a big grin. We assumed the poor guy had gone cuckoo at the time, but he wasn’t scared because he’d planned it all himself.