Gordon works in a monster-ridden Gotham as a bounty hunter and seeks to find answers about the Indian Hill escapees, and why their powers appear to be killing them. Meanwhile, Bruce’s doppelganger roams the streets, and Barbara and Tabitha open a new nightclub called The Sirens.
Fish Mooney takes matters into her own hands to locate Hugo Strange, forcing Gordon to reluctantly team up with journalist Valerie Vale to find her. Penguin rises in popularity after criticizing the work of the GCPD and Bruce's investigation of the Court of Owls is compromised. Meanwhile, Ivy Pepper is reintroduced into Gotham city.
Hypnotist Jervis Tetch/Mad Hatter arrives in Gotham to search for his sister, Alice, and hires Gordon to help find her. Meanwhile, Penguin decides to run for mayor and Bruce's doppelganger begins to channel him, causing some confusion around town.
Penguin gains power as he narrows in on the nomination for Mayor of Gotham. Meanwhile, Gordon turns Alice into the GCPD for the bounty. Also, Bruce and Alfred race to find Bruce’s doppelganger after learning he’s assumed Bruce’s identity.
Crime in Gotham is at an all-time high, as Penguin struggles to uphold his promises to the city. Meanwhile, Butch goes down a dark path with the infamous Red Hood Gang and Bruce begins to investigate Ivy's whereabouts.
Mad Hatter sets his eyes on his next victims, forcing Jim Gordon to make some tough decisions. Meanwhile, Penguin and Nygma's relationship evolves, and a familiar face comes back into Nygma's life.
After coming in contact with a substance by the hand of Mad Hatter, Jim Gordon gets led on a psychedelic trip and must confront his past, present and future. Meanwhile, Penguin struggles with Nygma’s new relationship.
The effects of a recent incident begin to cause Barnes to go mad; Nygma is over his head in his relationship with Isabella; Carmine Falcone throws an engagement party for Lee and Mario.
On the eve of their rehearsal dinner, a threat to Mario and Lee is exposed, and Falcone looks to Jim for help. Meanwhile, Nygma seeks revenge and Bruce learns more about The Court of Owls.