Supergirl Meets the Red Daughter in Episode 4.21 Promo

Supergirl Meets the Red Daughter in New Episode 4.21 Promo

The CW has released the first promo for Supergirl episode 4.21, titled “Red Dawn,” which highlights the incoming showdown between the girl of steel and her clone, the Red Daughter. The new episode airs May 12. Check out the video below!

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Alexis Ostrander directed this episode, from a story by Lindsay Sturman and a teleplay by Gabriel Llanas and Eric Carrasco. Moreover, its official synopsis reads:

“SUPERGIRL BATTLES RED DAUGHTER – Kara (Melissa Benoist) comes face to face with Red Daughter and the two engage in an epic battle. Determined to find a way to extract the Harun-El, Lena (Katie McGrath) turns to an unlikely source for help – Lillian Luthor (guest star Brenda Strong). Meanwhile, Alex (Chyler Leigh) realizes she’s missing parts of her memory, and Brainy (Jesse Rath), Nia (Nicole Maines) and J’onn (David Harewood) set out to track down aliens who have been abducted by Lex. “

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Supergirl stars Melissa Benoist (Glee) as Kara Danvers/Supergirl, Mehcad Brooks as James Olsen, Chyler Leigh (Grey’s Anatomy) as Alex Danvers, and Jeremy Jordan as Winslow ‘Winn’ Schott. Also appearing are Katie McGrath (Merlin) as Lena Luthor, Jess Rath as Brainiac 5, and David Harewood as Hank Henshaw/J’onn J’onnz. New to the cast for the fourth season is Sam Witwer as Agent Liberty. Additionally, Rhona Mitra comes aboard as Mercy Graves, and Bruce Boxleitner as Vice President Baker.

Based on the DC characters created by Jerry Siegel and Joe Shuster, the series is executive produced by Greg Berlanti, Sarah Schechter, Robert Rovner and Jessica Queller. Supergirl is produced by Berlanti Productions in association with Warner Bros. Television.

How do you think the big battle will go down? Be sure to let us know in comments!