Paul Chih-Ping Cheng

Pritchard and Duval try to uncover Albert Lin's true identity and his role in a string of murders; the investigation forces Otto to decide whether to betray Mary to align himself with Connor Graff; Gracie disappears.

Pritchard and Duval race to save Gracie from Connor and Otto's experiment; Alexa helps Mary try to unlock the code to save Pritchard's life; Otto struggles with his conscience.