Danny Mastrogiorgio

As a contentious City Council vote on the future of the Arkham District approaches, politicians on both sides are in danger. Gordon and Bullock must race to protect the Council. Meanwhile, an old friend visits Gordon.

Gordon and Bullock search for the source of a new street drug storming the streets of Gotham that causes euphoria then death. Meanwhile, Oswald Cobblepot works his way deeper into Maroni's (guest-star DAVID ZAYAS) inner circle and Fish Mooney continues her plot against Falcone.

As violence between Maroni and Falcone continues to escalate, Penguin reveals a new element of his manipulative strategy, forcing Gordon to deal with the consequences of his decision to spare Penguin's life.

Sgt. Voight and Detectives Lindsay and Halstead work with Sgt. Benson and the SVU as they investigate the roots of a child pornography site; tension between Benson and Voight threaten the investigation.

When two murder victims turn out to be members of the same group, Danny suspects a serial killer; Erin faces off with her ex-husband in court.

Rollins and Kat respond to a dangerous domestic violence call while Fin gives his deposition in the lawsuit against him.