Approximately two weeks have passed since the events of the season 2 finale. Alice fan Liam Crandle buys Mad Hatter's lost hat, learns its secret, and decides to become the second Mad Hatter. Alice apparently receives postcards from Jacob in Arkham Asylum as she is visited by Mary. Ryan Wilder recovers the poison ivy sprig as Luke Fox has issues with the glitches of his suit. Renee Montoya urges Mayor Hartley to let her act before Gotham City becomes "Jim Gordon's version" again. During Mary's g
Montoya explains that any violation will land Alice in solitary confinement in Arkham forever. Their first assignment is to deal with a Killer Croc-like situation involving the tooth of Killer Croc. As Jada Jet complains about industrial espionage to Ryan, Wayne's acting CEO, Sophie tells Ryan that Jada is her birth mother. Mary meets the Lucius Fox A.I. as Luke speculates that the health status was behind the glitch. Alice determines Killer Croc's hunting grounds, and Batwoman and Alice head th
Jada is impressed with Ryan but wants nothing to do with her. Her charming son Marquis, on the other hand, wants to work with Ryan behind Jada's back. He reveals Jada had Ryan from an extramarital affair and left home to keep her pregnancy a secret. The sudden freezing of a city bus points to the late Victor Fries, whose widow Nora survived being unfrozen but is now infirm, though cured of her original illness. Batwoman raids the GCPD evidence locker for Fries' machine. Before she gets there, No
No one is interested in Mary's strange overnight stay in the park, as Ryan is feted as one of Gotham's young business leaders. As she meets Marquis there, Sophie's sister Jordan disappears, and when Marquis helps them find her, she has been frozen somehow at room temperature. Alice persuades Montoya to let her out again after Mary speculates that her hallucinations may come from drugs given to her at Arkham. Alice determines that the Black Glove has been illegally experimenting with safely freez
Batwoman picks up Alice from Sophie's apartment to look at a man strangled with a bullwhip. Renee thinks it might be Catwoman's – it isn't, but Alice reviews old files with Renee. She identifies the killer as minor villain Flamingo but also learns about Renee's history with Poison Ivy. Ivy's powers and habits can be transmitted by infection, and Alice suspects this has happened to Mary. Mary suggests Alice's hallucinations are manifestations of her guilty conscience. Meanwhile, Ryan has been inv
A man is found entombed in a honeycomb with honeybees, alerting the police and Montoya. Sophie asks Renee about the Black Glove who froze the currently-recuperating Jordan. Renee gives her the available files, but advises Sophie to stay away from them. Mary revives the man, who claims she did this to him. Alice reveals Mary was infected by Ivy's plants so she traps herself in the Batcave. Batwoman and Alice later find Black Glove operative Virgil Getty, who froze Jordan and her friends, buried u
Ryan helps Jada capture Marquis in exchange for a cure for Mary's condition. As Jada prepares to place Marquis in suspended animation, he escapes and steals the cure. Alice and Mary flee Gotham, planning to give Alice a full blood transfusion to rid her of the tracker nanomachines. Marquis forces his way into Wayne Tower and beats Luke unconscious. Ryan confronts Marquis, who compels her to sign over control of Wayne Enterprises to him in exchange for Mary's cure. Mary's burgeoning mind control
In flashbacks, Renee betrayed her lover Poison Ivy and injected her with Batman's desiccation formula to stop her ecoterrorism. In the present, Poison Mary and Alice must use her mind-control abilities at a Metropolis hotel after Luke hacks Mary's credit cards. In Gotham City, Ryan, Sophie, and Renee crash Marquis' party at Wayne, subdue the guards, and reach the Batcave. There, Ryan becomes Batwoman and isolates a faint heartbeat where Poison Ivy was hidden by Batman deep in the Batcave. Poison
Ryan, Sophie, and Luke search for Poison Ivy in a national park, where she is hiding with Renee and not back to full power. Jada reunites with her old friend, John Diggle, and they look for Joker's joy buzzer to help treat Marquis. Alice finds herself dragged to a location by Poison Mary, who is being called by Poison Ivy. The Bat Team is attacked by Poison Ivy's plants, causing them to take refuge in a cabin. Upon her arrival, Poison Mary puts Alice to sleep so she won't interfere. Poison Ivy p
Poison Ivy is able to restore her powers from Poison Mary, but the latter's misgivings grow when Ivy murders a healthcare executive and plans to break Gotham Dam and flood the city. With help from Alice, Ryan and Luke try to get information from Renee about Poison Ivy. Jada gives the joy buzzer to Batwoman but demands Marquis' return by midnight. Mary decides to help Batwoman after Alice reveals her accidental murder of a hunter, and she and the others make a plan to use Mary as a Trojan horse f
Marquis' first move is to take over Arkham. Ryan visits Jada to learn her leverage against Marquis, but they are taken hostage by Victor Zsasz, the first member of Marquis' "work release program". While Batwing and Sophie break into Wayne Enterprises to recover the Lucius A.I., Mary and Alice locate Joker's toymaker Kiki Roulette to repair the joy buzzer. Kiki claims to have repented and takes them to her former workshop. Zsasz plans to kill Jada, but gives Batwoman an hour to rescue her. Ryan l
Alice's mental state worsens, causing her to hallucinate Mouse and Ocean. Mary feels betrayed that Alice didn't stop her Poison Mary transformation so Alice tracks down Kiki and demands she make another joy buzzer. However, Marquis shoots Kiki. Mary visits the family of the hunter she accidentally killed, only to learn that Alice took the blame for his death. Marquis abducts Jada and the other known Black Glove Society members Barbara Kean, Burton Crowne, Mario Falcone, and Jeremiah Arkham. He k
Marquis broadcasts to Gotham City from Joker's old hideout at Amusement Mile that he will expose Batwoman's identity in 5 hours. The Bat Team works with Jada to track down Marquis and counter his plot. After Mary's visit to a destabilizing Alice at Arkham, Ryan visits her and convinces Alice to let the joy buzzer be used on Marquis. Alice reveals what she learned from the inmates about Marquis' true plan, leading to Luke and Mary realizing that he is going to dispense Joker's acid over the city