Season 2 (Supergirl)

The second season of premiered on October 10, 2016, on The CW and concluded on May 22, 2017. The season consisted of 22 total episodes during its run.

Synopsis
When she was 12 years old, Kara Zor-El escaped the doomed planet Krypton and was sent to Earth where she was protected and raised by her foster parents, Jeremiah and Eliza Danvers and her foster sister, Alex. Under their supervision, Kara learned to conceal the phenomenal powers she shares with her famous cousin, Superman, in order to keep her identity a secret.

Years later, Kara was living a "normal" life in National City, assisting media mogul and fierce taskmaster Cat Grant and working beside her friend and IT technician Winslow "Winn" Schott and famous photographer James Olsen, who Grant hired away from Metropolis' Daily Planet. When Alex's life was threatened in a plane crash, Kara took to the sky to rescue her. In the aftermath, Kara decided she could no longer sit on the sidelines and came out as Supergirl. She now balances her job at CatCo with her work at the Department of Extranormal Operations (DEO), a super-secret government agency where Alex also works. At first, the head of the DEO, Hank Henshaw, was resistant to Supergirl joining the DEO, until it was revealed that Hank was actually J'onn J'onzz, the Martian Manhunter, who had promised Jeremiah Danvers on his deathbed that he would protect both Alex and Kara. It has since been discovered that Jeremiah is actually alive and being held by Cadmus, a dangerous quasi-military organization that sees all aliens as threats. In Season One, Supergirl soared fighting crime and battling various villains, chief among them two Kryptonians who were intent on destroying Earth, but she has yet to find that same empowerment as Kara Danvers.

Now, in Season Two, 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.

Main Cast

 * Melissa Benoist as Supergirl/Kara Danvers (Kara Zor-El)
 * Mehcad Brooks as Guardian (James "Jimmy" Olsen)
 * Chyler Leigh as Alex Danvers
 * Jeremy Jordan as Winn Schott
 * Floriana Lima as Maggie Sawyer
 * Chris Wood as Mon-El/Mike Matthews
 * David Harewood as Martian Manhunter/John Jones (J'onn J'onzz) / Cyborg Superman (Hank Henshaw)

Recurring Cast

 * Tyler Hoechlin as Clark Kent/Superman (Kal-El)
 * Calista Flockhart as Cat Grant
 * Katie McGrath as Lena Luthor
 * Brenda Strong as Lillian Luthor
 * Andrea Brooks as Eve Teschmacher
 * Frederick Schmidt as Metallo (John Corben)
 * Ian Gomez as Lucas "Snapper" Carr
 * Lynda Carter as President Olivia Marsdin
 * Sharon Leal as Megan Morse/Miss Martian (M'gann M'orzz)
 * Dean Cain as Jeremiah Danvers
 * Helen Slater as Eliza Danvers
 * Kevin Sorbo as Lar Gand
 * Teri Hatcher as Rhea
 * Curtis Lum as Demos
 * Tamzin Merchant as Lyra Strayd

Soundtrack
On October 10, 2017, an album consisting of incidental music from the season was released digitally on Spotify and Amazon Music.