"Lucifer must find the antidote to the Professor's poison before it kills Chloe. He travels to hell to find the Professor's soul and get him to turn over the antidote. While he's there, he is forced to confront his guilt about Uriel's death. Mom heads to hell to get Lucifer back, but Lucifer still feels betrayed by his parents because of something he discovers."
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Lucifer and Chloe desperately search for an antidote to save her, learning from the Professor's associate that he sourced the ingredients for his poisons from an amateur artist. Chloe collapses and is hospitalized, while Dan and Lucifer learn that the formula for the antidote was known only to Carlisle. With no other options, Lucifer has Maze and Linda stop his heart, allowing him to enter Hell and find Carlisle's soul, which is now eternally tormented by an illusion of the driver's death. Lucifer tricks him into turning over the formula in return for absolution, which is subsequently denied. While waiting to be revived, however, Lucifer stumbles upon an illusion of Uriel, who forces Lucifer to kill him again and again with Azarel's blade. Charlotte sends herself to Hell to free him, but ends up succumbing to her own guilt, forcing Lucifer to drag her away. Upon being revived, Lucifer meets up with Dan and Ella, who have retrieved the ingredients, and creates the antidote. Charlotte tries to reconnect with her son, but he disowns her for deceiving him. When Chloe visits Lux later that night, she is shocked to find it closed for business, with Lucifer nowhere to be found.
"Everything's Coming Up Lucifer" • "Liar, Liar, Slutty Dress on Fire" • "Sin-Eater" • "Lady Parts" • "The Weaponizer" • "Monster" • "My Little Monkey" • "Trip to Stabby Town" • "Homewrecker" • "Quid Pro Ho" • "Stewardess Interruptus" • "Love Handles" • "A Good Day to Die" • "Candy Morningstar" • "Deceptive Little Parasite" • "God Johnson" • "Sympathy for the Goddess" • "The Good, the Bad and the Crispy"