The group uses Ray's invention to track new recruits to help save the universe. The Monitor sends Iris, Clark and Lois in search of a mysterious Kryptonian, while Kate and Kara head out to find Bruce Wayne. In addition, Mia challenges Sara, Rory discovers a hidden talent, and Lex Luthor returns. This crossover begins on Supergirl S5E09, and continues on The Flash S6E09, Arrow S8E08, and Legends of Tomorrow S05E01.

More of Alice’s dark past is uncovered when Cartwright shares a twisted story with Kate while Jacob goes searching for his wayward daughter. Mary and Luke follow a lead on Beth's killer.

When a familiar foe descends upon Gotham, Batwoman and Mary find they must rely on each other more than ever. Alice has a has a new mission - and gets an unexpected ally to join her.

Kate begins to question her instincts and Luke gets upsetting news. Alice seeks her sister’s help with a special task.

Batwoman struggles as Black Mask continues to raise the stakes with Circe as his henchwoman. Alice and Safiyah cross paths once again.

When Sophie must face a foe from her rookie days with The Crows, Ryan, Mary and Luke are also pulled into the villain's game. Meanwhile, the tables turn on Alice when she finds herself in dire circumstances, and Jacob continues to revisit the past.

As Luke Fox's life hangs in the balance, repercussions from the devastating event are the catalyst for some life-changing decisions for those around him.

Ryan questions her place as the city's hero as she, Luke, Mary and Sophie must join forces when Black Mask instigates chaos in the Gotham streets. Meanwhile, Alice's attempt to rescue her sister means another encounter with Circe. In an epic standoff, unexpected alliances and transformations will upend Gotham as we know it.

With the hunt for Alice heating up, Kate faces a difficult decision.

Batwoman enlists Luke and Julia for an undercover mission to recover one of the most important items from her cousin’s arsenal. While Alice continues developing her devious plans within Arkham’s walls, she gets an unexpected visit from Jacob Kane who needs her help. Meanwhile, Mary tries to prove herself to Kate. As Sophie gets closer to a co-worker, Kate reunites with an old flame.

On the Kane sisters’ birthday, Kate and Alice contend with demons from the past, and an unexpected guest makes a surprise appearance in Gotham.

Batwoman's abilities are tested like never before, while Alice's search for Kate continues. Sophie and Jacob set their sights on Coryana, and Luke and Mary contend with an unexpected guest.

Ryan is faced with a difficult decision that could expose her as Batwoman, creating a rift in the Bat Team. Meanwhile, Black Mask's plans for Kate Kane begin to unfold. Alice is reunited with someone from her past, and Sophie must decide where her loyalty lies.

Kate and Alice continue their sister/nemesis dance, while Alice and Mouse construct their most evil plan yet. Mary invites Kate to a special event honoring Catherine and Jacob makes a decision that leaves Kate perplexed.

Batwoman encounters a new challenge when an old villain resurfaces, testing the heroics of Gotham’s most stand-up citizens. Alice’s limits are tested.

When members of Gotham's intelligentsia begin disappearing, Commander Kane, Sophie and the Crows go searching for the newest homicidal threat to the city. In the meantime, Kate is consumed with someone’s betrayal and starts questioning the loyalty of everyone around her just when she needs them most. So when Luke and Julia go missing, Batwoman must rely on Mary and a former foe to deploy her rescue mission. Meanwhile, Alice enlists Tommy Elliot to help acquire an elusive item that her sister also seeks.

When one of Gotham's former heroes returns to his old stomping grounds to settle a score, both Batwoman and Commander Kane find themselves on the defensive. Meanwhile, Alice has uncovered what could finally take down Batwoman, but she is losing hold on her henchman Mouse and Hush, sending her spiraling into her most wicked self. Luke immediately focuses on finding a way to protect Batwoman from Alice, and Mary has a chance to be the sister Kate has needed all along. New information surfaces, forcing Julia to warn Sophie about the person pulling the strings. And in a final standoff, when Commander Kane refuses to retreat from his war on Batwoman, Kate may find herself more than heartbroken by her father’s choices.

With Batwoman and The Crows each hot on the trail of the False Face Society, their efforts collide, and tension escalates. Alice seeks out Enigma, and Sophie and Ryan find some common ground.

Alice takes Kate down the sad, winding road of her life in the days after the accident as Jacob and Sophie attempt to track them. Mary has an argument with Catherine which sends her looking for Kate at Wayne Tower, but instead she becomes unwelcome company for Luke.

A new villain sinks her teeth into Gotham and The Hold Up opens in grand fashion. Sophie reluctantly requests that Batwoman keep her distance knowing their interactions could compromise her career.

Batwoman is faced with a new challenge when Gotham's Snakebite addicts become ravenous for more than the next fix.

Batwoman and Luke are on the trail of a villain targeting social media mavens. Sophie gets an unexpected visit from her mother, and Mary offers her expertise to assist Kate. Jacob Kane is approached to make good on a favor, while Alice focuses on her plans for retribution.

As Ryan Wilder continues to prove herself as Batwoman, she encounters the challenge of every superhero - living a double life. Meanwhile, Victor Szasz is slashing his way through the city streets, and Commander Kane has The Crows trying to stop the flow of Snakebite through Gotham. Safiyah takes notice of Alice's antics and Sophie finds herself in unexpected circumstances.

Batwoman confronts Gotham's biggest foe, while new information forces those closest to Kate to make some difficult decisions. Ryan's feelings for Angelique puts her partnership with Luke and Mary at risk, while Alice goes on a warped walk down memory lane.

A disturbing death has Gotham reeling and the city reaches out for their new vigilante hero. Luke confides in Kate, while Sophie asks Jacob for a special assignment. Alice continues her nefarious plot against the Kanes, with Catherine being a conduit to part of her plan. Batwoman pays another visit to Mary.