While the celestial beings deal with resurrection, Charlotte Richards undergoes a deeply human transformation. Struggling with memories of her time in Hell, she begins therapy with Dr. Linda.
Abel is revealed to be the "infernal guinea pig" on whom the demons of Hell practiced their torture for millennia. [S3E16] Infernal Guinea Pig
The narrative centerpiece is Lucifer’s "hell-raising scheme" to help Marcus Pierce (Cain) remove the mark of immortality. Lucifer resurrects the soul of the first murder victim, Abel, and places him into the body of a freshly deceased woman named Bree. This subplot serves several thematic purposes: While the celestial beings deal with resurrection, Charlotte
The episode also deepens the bond between the lead duo. A murder investigation involving a Hollywood producer and a Bolivian drug cartel puts Chloe’s life in immediate danger when a filing cabinet is rigged with a bomb. Abel is revealed to be the "infernal guinea
Witnessing Chloe's mortality firsthand, Lucifer realizes that his alliance with Pierce—and the proximity of celestial danger—is a direct threat to her.