Squid Game (2021)

The first season's closing episodes hold a reveal that sends newcomers straight back through earlier scenes in their heads, and you get to watch them do the math. The hook is the games: cash-strapped players competing in children's pastimes for a huge prize, with deadly stakes. What makes it land is the friendships it builds and then tests, so the emotional peaks hit as hard as the shocks. Offer the original Korean with subtitles if your companion is game; the performances come through far better.