"Rule #1" is the ninth episode of the second season of , and the twenty-ninth and most recent episode overall. It aired on March 28, 2021.
|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 Fox and Mary Hamilton at risk, while Alice goes on a warped walk down memory lane.|
While Ryan is in the Batcave with the Desert Rose, Julia, Sophie, Mary, Luke and Jacoba go to Kate's funeral. Black Mask visits Kate in her cell and said that her family declared her dead, but they would make them believe in life after death.
Black Mask and Enigma appear in Kate's cell. Enigma expressed sympathy for Kate's condition and asked if she could be alone with her. After Black Mask left, she introduced herself to Kate and vowed to help her forget who she was.
- Javicia Leslie as Ryan Wilder/Batwoman
- Rachel Skarsten as Beth Kane/Alice
- Meagan Tandy as Agent Sophie Moore
- Nicole Kang as Mary Hamilton
- Camrus Johnson as Luke Fox
- Dougray Scott as Commander Jacob Kane
- Peter Outerbridge as Roman Sionis/Black Mask
- Christina Wolfe as Agent Julia Pennyworth
- Laura Mennell as Enigma
- Bevin Bru as Angelique Martin/Baby Doll
- Gracyn Shinyei as Young Kate Kane
- Keeya King as Jordan Moore
- Cameron McDonald as Commissioner Forbes
- Allison Riley as Dana Dewitt
- Matt Reimer as Gas Mask
- Nathaniel Shuker as Guy Fawkes
- Tommy Europe as Hockey Mask
- Sabrina Miniaci as Crows Agent #1
- Chad Bellamy as Plague Doctor
- This episode marks the first appearance of Black Mask and Jordan Moore.
- Ryan mentions Bruce Wayne, revealing she knows Bruce being Batman just like how she found out on Kate being Batwoman.
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