Gordon and Bullock set out to stop Gerald Crane, a biology teacher who has been harvesting the glands of his murder victims. Meanwhile, after finding herself in an unusual setting, Mooney continues plotting to gain power, and Falcone attempts to change Maroni's plan for the Penguin. Then, Bruce takes a treacherous hike.
Elenco: Ben McKenzie , Donal Logue , David Mazouz , Sean Pertwee , Robin Lord Taylor , Erin Richards , Camren Bicondova , Cory Michael Smith , Cory Michael Smith , Michael Chiklis , James Frain , Jessica Lucas , Chris Chalk , Robin Taylor , Victoria Cartagena , Zabryna Guevara .