Supergirl is an American superhero television series developed by Ali Adler, Greg Berlanti and Andrew Kreisberg. It is based on the DC Comics character Supergirl, created by Otto Binder and Al Plastino with Melissa Benoist in the title role. Supergirl is a costumed superheroine who is Superman's cousin and one of the last surviving Kryptonians. The series is the third series set in the Arrowverse, sharing continuity with the other television series of the franchise.
Twelve-year-old Kara escaped the doomed planet Krypton with her parents' help at the same time as the infant Kal-El. Protected and raised on Earth by her foster family, the Danvers, Kara grew up in the shadow of her foster sister, Alex, and learned to conceal the phenomenal powers she shares with her famous cousin in order to keep her identity a secret. Years later, at 24, Kara lives in National City assisting media mogul and fierce taskmaster Cat Grant. She works alongside her friend and IT technician Winn Schott and famous photographer James Olsen, who Grant just hired away from the Daily Planet to serve as her new art director. However, Kara's days of keeping her talents a secret are over when Hank Henshaw, head of a super-secret agency where her sister also works, enlists her to help them protect the citizens of National City from sinister threats. Though Kara will need to find a way to manage her newfound empowerment with her very human relationships, her heart soars as she takes to the skies as Supergirl to fight crime.
Kara has left the safety of being Cat Grant's assistant in order to figure out what she really wants to do, while as Supergirl she continues to work at the DEO., protecting the citizens of National City and searching for Jeremiah and Cadmus. Along the way, she will team up with Superman to battle new villains, as she strives to balance her personal life with her life as a superhero.
Kara investigates a secretive new group whose leader, Thomas Coville, has a mysterious connection to Supergirl. Meanwhile, Samantha feels like she's letting Ruby down, and J'onn confesses an old secret.
Lex sets off a Kaznian invasion with the hopes of presenting himself as the hero to save the world from an impending war. This allows Lena a nice moment of redemption where she gets to take him down and help Supergirl and prove to her friend that her heart and soul are really in the right place after all.
Supergirl fights against Rama Khan and Leviathan. Lex and Lena are forced to work together when Lena's project fails to work and they get stuck inside a prison riot. Lex helps Leviathan against Supergirl. Dreamer has visions of Brainy while fighting Leviathan, which she later realizes were about his secret plans.
Season 6 at works
Supergirl finds an opportunity to escape from the Phantom Zone, but it comes with some dangerous strings attached. Meanwhile, Lena joins the Superfriends on a mission but finds she disagrees with their plan of action against the Phantoms and wonders if she is truly ready to be a part of the team.