Season 3
23 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
Kara deals with the loss of Mon-El by focusing her energy on being Supergirl and concentrating on a mysterious new threat. Alex confesses a secret to Maggie. A citizen of National City has a mysterious connection to Kara. Lena makes a bold move.
A thief with psychic powers attacks National City and proves to be a formidable opponent for Supergirl.
Maggie reaches out to her estranged father when Eliza throws her and Alex a wedding shower, while Supergirl joins J'onn on a personal mission.
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.
Morgan Edge blames Lena for children getting sick from lead poisoning.
The adventures of Superman's cousin and her own superhero career.