The CW has released the Official Synopsis of Supergirl episode “Elseworlds – Part 3” (4.09) that will be aired Tuesday, December 11 at 08:00-09:00 PM.
THE BATTLE CONCLUDES
Supergirl (Melissa Benoist), The Flash (guest star Grant Gustin), Green Arrow (guest star Stephen Amell) and Superman (guest star Tyler Hoechlin) engage in the battle of their lives.
SUPERGIRL stars Melissa Benoist as Kara Danvers/Supergirl, Chyler Leigh as Alex Danvers, Mehcad Brooks as James Olsen, David Harewood as Hank Henshaw, Jeremy Jordan as Winslow “Winn” Schott and Tyler Hoechlin as Superman.
Supergirl is an action-adventure drama based on the DC Comics character Kara Zor-El (Melissa Benoist), Superman’s (Kal-El) cousin who, after 12 years of keeping her powers a secret on Earth, decides to finally embrace her superhuman abilities and be the hero she was always meant to be.
Based on characters appearing in comic books and graphic novels published by DC Comics, with executive producers Greg Berlanti, Ali Adler, Sarah Schecter and Andrew Kreisberg for Berlanti Productions in association with Warner Bros. Television.