The Disney+ TV show Loki is largely about The Multiverse and the overarching timeline in the Marvel Cinematic Universe. At this point I should warn you that I'm about to drop some spoilers if you're not all caught up on Marvel movies and TV shows. You should watch at least episodes 1 and 2 of Loki, Thor: Ragnarok, and the Avengers movies. Watch Doctor Strange, Ant-Man and the Wasp, and Wandavision for good measure. This is your second and final SPOILER ALERT.