Supergirl was renewed for a third season by The CW on January 8, 2017.[1] It premiered on October 9, 2017.


Main cast

Special appearance by

Special guest cast

Recurring cast


Thirteen-year-old Kara escaped the doomed planet Krypton with her parents' help at the same time as the infant Kal-El. Protected and raised on Earth by her foster family, the Danvers, Kara grew up in the shadow of her foster sister, Alex, and learned to conceal the phenomenal powers she shares with her famous cousin in order to keep her identity a secret. Years later, Kara was living in National City and still concealing her powers, when a plane crash threatened Alex's life and Kara took to the sky to save her. Now, Kara balances her work as a reporter for CatCo Worldwide Media with her work for the Department of Extra-Normal Operations (D.E.O.), a super-secret government organization whose mission is to keep National City and the Earth safe from sinister threats. At the D.E.O., Kara works for J'onn J'onzz, the Martian Manhunter, and alongside her foster sister, Alex, and best friend, Winn Schott. Also in Kara's life are media mogul Cat Grant, James Olsen, a photo journalist who moonlights as Guardian, a masked vigilante, Lena Luthor, and Mon-El of Daxam, whose planet was ravaged by Krypton's destruction. As Kara struggles to navigate her relationships and her burgeoning life as a reporter, her heart soars as she takes to the skies as Supergirl to fight crime.[2]

Confirmed plot points

Confirmed new characters

  • M'yrnn J'onzz: The father of Martian Manhunter. Known for being a "pacifist religious leader" on his home planet of Mars, Papa J'onzz will apparently push his son in "unexpected ways".[5]
  • Oscar Rodas: Maggie Sawyer's father who is also a cop. [12]
  • Thomas Coville: The charismatic religious leader of a group that worships the Girl of Steel.[10]
  • Imra Ardeen/Saturn Girl: Uses her telekinetic ability to help those in need. She was born on Titan, one of Saturn’s moons, and arrives on Earth to help Supergirl battle one of her biggest threats.[7]
  • Patricia Arias: The adoptive mother of Odette Annable’s Samantha (aka Reign).[11]


# Episode name Directed by Story by Teleplay by Original airdate
1 "Girl of Steel" Jesse Warn Andrew Kreisberg Robert Rovner & Caitlin Parrish October 9, 2017
Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and the mysterious new threat against National City. Alex confesses a secret to Maggie about their impending nuptials. A citizen of National City has a mysterious connection to Kara, and Lena Luthor makes a bold move.
2 "Triggers"[13] David McWhirter[14] Gabriel Llanas & Anna Musky-Goldwyn[14] October 16, 2017[15]
Psi, a thief with psychic powers, attacks National City. Able to immobilize people by tapping into their worst fears, Psi proves a formidable opponent for Supergirl. Meanwhile, James Olsen and Lena Luthor are at an impasse, and Samantha starts her new job at L-Corp.[14]
3 "Far From the Tree"[13] Dermott Downs[16] Jessica Queller & Derek Simon[16] October 23, 2017[17]
Eliza throws Alex and Maggie a wedding shower, which causes Maggie to reach out to her estranged father. Supergirl joins J'onn on a personal mission.[16]
4 "The Faithful"[18] Jesse Warn[19] Paula Yoo & Katie Rose Rogers[19] October 30, 2017[19]
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, and J'onn confesses an old secret.[19]
5 "Damage"[20] Kevin Smith[20] Eric Carrasco & Cindy Lichtman[20] TBA
6 "Midvale"[21] TBA TBA TBA
7 "Wake Up"[18] Chad Lowe[18] TBA TBA
8 "Crisis on Earth-X"[22] Larry Teng[23] TBA November 27, 2017[24]



  1. The CW renews seven series including 'Arrow,' 'The Flash,' 'Supernatural' and 'Crazy Ex-Girlfriend' - LA Times
  2. 2.0 2.1 2.2 SUPERGIRL SEASON 3 SYNOPSIS - Supergirl TV
  3. The Futon Critic - Far From the Tree
  4. 4.0 4.1 ‘Supergirl’: Katie McGrath Promoted To Series Regular For Season 3 - Deadline
  5. 5.0 5.1 5.2 5.3 5.4 5.5 Supergirl Season 3 Adds Adrian Pasdar, Yael Grobglas and Alias' Carl Lumbly - TVLine
  6. 6.0 6.1 6.2 Supergirl Recasts Two Key Roles - TVLine
  7. 7.0 7.1 Supergirl Season 3: Bollywood Star Amy Jackson to Recur as Saturn Girl - TVLine
  8. Supergirl EP Talks True Four-Way DCTV Crossover, Nixes Doppelgänger Cameos - TVLine
  9. Arrowverse Crossover: (Spoiler)'s Wedding Confirmed in Key Art - TVLine
  10. 10.0 10.1 TVLine Items: Supergirl Cult Finds Its Leader, Amazon's Lore Trailer and More - TVLine
  11. 11.0 11.1 TVLine Items: Supergirl Casts Reign's Mom, Freaky Friday Musical and More - TVLine
  12. Supergirl Casts 24 Vet Carlos Bernard as Maggie's (Spoiler) in Season 3 - TVLine
  13. Cite error: Invalid <ref> tag; no text was provided for refs named E1-E3
  14. 14.0 14.1 14.2 Official Synopsis For Episode 302 - Supergirl.Tv
  15. Supergirl #3.2 Spoiler Description: "Triggers" - KryptonSite
  16. 16.0 16.1 16.2 Season 3 Episode 3 Synopsis Released - Supergirl.TV
  17. Supergirl "Far From The Tree" Official Description - KryptonSite
  18. 18.0 18.1 18.2 Supergirl books Chad Lowe to guest and direct - EW
  19. 19.0 19.1 19.2 19.3 The Futon Critic
  20. 20.0 20.1 20.2 Supergirl - Episodes 3.05 & 3.06 - Titles Revealed - SpoilerTV
  21. Supergirl recasts young Kara for Danvers sisters flashback episode - EW
  23. Larry Teng Directs 1st Episode of 2nd Crossover -
  24. Shows A-Z - supergirl on cw - The Futon Critic