Jacob Kane and the Crows up the stakes; Kate continues to look to Bruce Wayne's legacy for guidance as Luke Fox inadvertently gets pulled into Batwoman's vigilante heroics; Sophie and Kate are forced to team up.

The city waits for another visit from who they think is Batman. Alice continues to taunt Kate. Mary gets an unexpected new friend. As Batwoman faces a new enemy, Kate realizes she must make a decision.

A new villain with an eye for all things that sparkle drops in on the city; Kate attempts to find a balance between her personal life and her new role as Gotham's guardian; Luke continues to fine-tune Batwoman's arsenal of weapons.

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 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.

Kate and Sophie must reconcile with their past as Kate questions just how much she can trust her former lover. Kate and Luke have an encounter with an old friend. Mary grapples with the fate of the Kane family as Catherine seeks Jacob's help. Alice and a new cohort are in on yet another nefarious plan, but her motives are more than they seem.

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.

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.

While Gotham busies itself reacting to Batwoman's awkward encounter, Alice celebrates her ultimate act of vengeance with Mouse. A devastated Mary focuses on Jacob Kane's trial, while Sophie seeks advice about her love life from someone unexpected. As they tackle the newest threat to Gotham, Luke prioritizes protecting Batwoman's secret, and Kate must decide what she is willing to do to honor Batwoman's identity...and her own.