Season 4
22 episodes
42 min. per episode
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A young hero battles personal doubts and external threats, discovering her true power while redefining what it means to be a hero.
Trailer
Episodes
Supergirl is called into action when remnants of Cadmus attempt to assassinate pro-alien leaders, but their endgame turns out to be more sinister than she thinks.
When a shocking revelation brings chaos to National City, Supergirl sets out to capture Mercy Graves.
The story of how Ben Lockwood became Agent Liberty is told.
Alex asks Lena and Brainiac to team up and help Supergirl; J'onn discovers new ways to help his fellow aliens after running into Manchester Black.
Colonel Haley makes a surprising decision about Supergirl; Kara writes a series of articles about aliens in National City that end up putting them in harm's way.
The adventures of Superman's cousin and her own superhero career.