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Season Three
Supergirl
Supergirl - Season 3
Season Premiere October 9th, 2017
Season Finale June 18th, 2018
Episode Count 23
Cast Melissa Benoist; Mehcad Brooks; Chyler Leigh; Jeremy Jordan; Katie McGrath; Odette Annable; David Harewood
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Season 4

Season Three of Supergirl began airing on the CW Network on Monday, October 9th, 2017. This was the second season of the series to air on the CW Network. The season had a full twenty-three episode run through June, 2018. This season saw the return of seasons one and two regulars, Melissa Benoist as Kara Danvers, aka Supergirl, Mehcad Brooks as James Olsen, Chyler Leigh as Alex Danvers, Jeremy Jordan as Winn Schott, and David Harewood as J'onn J'onzz. Actress Katie McGrath, who played Lena Luthor in season two, joined the main cast line-up. Odette Annable joined the main cast this season as a new character, Samantha Arias. Notable guest stars this season include Floriana Lima as Maggie Sawyer, Adrian Pasdar as Morgan Edge, Helen Slater as Eliza Danvers, and Calista Flockhart in special guest appearances as Cat Grant. Actress Erica Durance had a recurring role in the season as Alura Zor-El - a part that had been previously played by Laura Benanti.

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  • This season comprises episodes 43-65.

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