Some lies are easy to spot. Unless you're watching the wrong hand.
Marco Talbot dead at a poker table — Joker on chest, rose in mouth, room locked from the inside. Mirror Deck mythology introduced. The Red Thread Society. Detective Eliza Quinn introduced and revealed as killer.
This is the episode that reframes the entire first season. Everything before it was misdirection. That's not a complaint — that's the whole architecture. The show earns it because it was never hiding the answer. It was hiding the question.

The Mirror Deck conceit lands here with the specificity of something long planned: each card corresponds to a kind of truth the killer believes they're delivering. The Joker is a punishment for someone who thought the game was funny. The Lovers — missing from the scene, recovered later — is the tell Eliza left deliberately. She wanted to be found eventually. Not yet.
Detective Eliza Quinn is played with the kind of stillness that reads as competence until you understand it's control. She is always the most capable person in the room. The tragedy is that the room keeps filling with people who need her to be.
Location: Abandoned casino, Los Angeles Victim: Marco Talbot, ex-magician Twist: The detective did it. Missing card = The Lovers