After keeping her powers a secret for 12 years, Kara Zor-El, Superman's cousin, decides to embrace her abilities and be the hero she was always meant to be.
Doubts start to form in Kara's mind when her attempts to protect National City fail to go to plan. Cat tries to persuade James to get her an interview with Supergirl.
Supergirl's powers are put to the test when Reactron, one of Superman's most formidable enemies, shows up in National City.
Kara and her boss come under threat from a volatile CatCo employee who undergoes a major transformation. Kara's mother arrives for Thanksgiving.
Kara struggles to juggle her two lives when National City comes under threat while she is babysitting Cat's son.
Stress gets the better of Kara when she pushes herself too far during a training exercise against military cyborg Red Tornado.
Melissa Benoist
Kara Danvers/Supergirl
Mehcad Brooks
James Olsen
Chyler Leigh
Alex Danvers
Jeremy Jordan
Winslow "Winn" Schott
Chris Wood
Mon-El