The layers come into play, though, when you start moving those pieces around the game board, and Squid Game does a brilliant job of that in its second season, when it puts the Front Man into the game as player 001—except the viewers are the only ones who know who he really is.

Here's your guide to the twists surrounding Player 001 in Squid Game Season 2, a role played by Lee Byung-hun.

But there's plenty of behind-the-scenes footage that shows how much fun the set could be -- while also being a lot of hard work. While at least one of Season 2's games managed to make a lot of the cast sick,

"Squid Game" is one of Netflix's most popular shows of all time - but it still has plenty of plot holes that'll confuse sharp-eyed viewers.