Okay, this is a bit of a Rube Goldbergian cause-and-effect chain, but bear with me. The team is fighting Neron, the demon who owns Constantine’s soul, and is looking for a new, living vessel to inhabit. Constantine sets a trap using (a well-aware) Nora Darhk as bait, but the uninformed Ray rushes to the scene, thinking to protect Nora, but instead disrupting the spell—and causing Neron to secretly possess his body. In order to atone, Constantine travels to hell to rescue Ray’s soul, which allows Astra the chance to steal the soul coins of 16 historical evildoers, which she releases back to Earth in hopes of getting her soul back from the Fates. As a result, Rasputin, Bugsy Malone, Damian Darhk, Genghis Khan, and more return to the timeline to raise havoc. Also, Marie Antoinette’s headless corpse gets a flamethrower, because that’s how Legends of Tomorrow rolls. (Season 4, “The Eggplant, the Witch, and the Wardrobe” through much of Season 5)