|Supergirl, Batwoman, and the Birds of Prey|
|Season 3, Episode 15|
|You Ruin Me||The Trial of Kal-El|
Supergirl, Batwoman, and the Birds of Prey is the fifteenth episode of Supergirl Season 3 and the 57th episode overall.
SUPERGIRL DISCOVERS BATWOMAN'S IDENTITY- After finally engaging the vigilante known as Batwoman in combat, Kara is stunned when she discovers Batwoman is Alex. When Laurel comes to the DEO requesting help in defeating Livewire, Kara and Alex are all too happy to assist their old teammates. Lena confronts Lex and D.I.S.C.O.R.D., while Karen returns to New Krypton when Cyborg Superman invades the planet; tensions between Alura and Astra come to a head. Maggie interrogates Lesla.
- Melissa Benoist as Kara Danvers/Supergirl
- Chyler Leigh as Alex Danvers/Batwoman
- Jeremy Jordan as Winslow Schott
- Katie McGrath as Lena Luthor
- Laura Benanti as Alura Zor-El/Astra In-Ze
- Tyler Hoechlin as Cyborg Superman
- Floriana Lima as Maggie Danvers
- Zachary Quinto as General Dru-Zod
- Odette Annable as Reign
- Jenna Dewan as Lucy Lane
- with Claire Holt as Karen Starr
- and David Harewood as J'onn J'onzz
Special Guest StarsEdit
- Katie Cassidy as Laurel Lance/Black Canary
- Jessica de Gouw as Helena Bertinelli/Huntress
- Chris Wood as M'On-El
- Katheryn Winnick as D.I.S.C.O.R.D.
- Harry Lennix as Commander Fer-Gor
- Chris Vance as Non
- Tracy Spiridakos as Lesla-Lar
- Paige Turco as Lara Lor-Van
- Casper Crump as Vandal Savage
- Brit Morgan as Livewire
- Georgina Campbell as Lieutenant Asha Del-Nar
- Robert Gant as Zor-El (hologram)
- Wallis Day as Nyssa-Vex
- with Michael Rosenbaum as Lex Luthor
- and Dianna Agron as Raya Zod-El
- Antagonists: Livewire, Lex Luthor, D.I.S.C.O.R.D., Cyborg Superman
- Kal and Sam do not appear in this episode.
- Livewire was last seen in We Can Be Heroes.