A dead pool makes a prediction that Mary will die on the same day as the launch of an important Lookinglass product. Pritchard ends up at the hospital following a brawl.

Pritchard and Duval attempt to catch a killer who mutilates and disfigures victims.

Pritchard and Duval team up to chase a serial killer. Meanwhile, Mary and Pritchard's bond grows stronger, but Otto wants to make sure she'll always be by his side; and Gracie tries to get to the bottom of Pritchard's identity.

Albert Lin's real identity and who created him present a dilemma for Pritchard and Duval, who also frantically search for Gracie after she goes missing. Meanwhile, Otto's relationship with Mary is strained by the investigation, and he mulls the risk of destroying everything they've built, including Pritchard, by siding with Connor Graff.

Gracie's life is in danger unless Pritchard and Duval can reach her in time and rescue her from Connor and Otto's experiment. Meanwhile, Mary and Alexa search for a way to save Pritchard since he can no longer regenerate in the tank; and Otto struggles to come to grips with his decisions that have touched so many lives.