|The Justice League of America|
|Season 6, Episode 2|
|Seeing Double||Throne of Atlantis|
PART 1: THE JLA IS BORN- Kara Danvers and Karen Starr answer the call when Clark Kent informs them of the team of superheroes he has created with Bruce and Diana, while Arthur Curry and Mera deal with an insurrection in Atlantis.
- Melissa Benoist as Kara Danvers/Supergirl
- Chyler Leigh as Alex Danvers
- Katie McGrath as Lena Luthor
- Odette Annable as Reign (credit only)
- Tyler Hoechlin as Clark Kent/Superman
- Olivia Wilde as Susannah Russo (credit only)
- Jenna Dewan as Lucy Lane (credit only)
- Minka Kelly as Dawn Granger
- Claire Holt as Karen Starr/Power Girl
- Michael Rosenbaum as LX-52/President Lex Luthor (Earth-30)
- with Emmy Rossum as Zaora Dru-Zod
- and David Harewood as J'onn J'onzz
Special Guest StarsEdit
- Patrick Wilson as Orm Marius/Ocean Master
- Grant Gustin as Barry Allen/The Flash
- Luke Evans as Bruce Wayne/Batman
- Katie Cassidy Rodgers as Laurel Lance/Black Canary
- with Amber Heard as Mera/Hila
- and Jason Momoa as Arthur Curry/Aquaman/Lobo
- Marie Averopoulos as Diana, Princess of Themyscira/Wonder Woman
- Matt Letscher as Eobard Thawne
- Laura Vandervoort as Indigo
- and Troian Bellisario as Mary Seward
- Antagonists: Orm Marius, Lobo, Hila
- Reign, Susannah, and Lucy do not appear in this episode.
- This episode takes place January 5, 2021.
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