Season 3 (Supergirl)

Season 3
Information
Number of episodes	[[List of Supergirl episodes#Season |7]]
Chronology
Followed by	Season 1

[[Category:Season {{{number}}} (Supergirl)| ]]

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

Cast

Main cast

• Melissa Benoist as Kara Danvers/Supergirl and Kara/Overgirl
• Mehcad Brooks as James Olsen and James Olsen's Earth-X doppelgänger
• Chyler Leigh as Alex Danvers
• Jeremy Jordan as Winn Schott
• Katie McGrath as Lena Luthor
• Odette Annable as Samantha Arias/Reign
• Chris Wood as Mon-El
• David Harewood as J'onn J'onzz/Martian Manhunter

Special appearance by

• Calista Flockhart as Cat Grant
• Jessica Parker Kennedy

Special guest cast

• Floriana Lima as Maggie Sawyer
• Helen Slater as Eliza Danvers
• Grant Gustin as Barry Allen/The Flash
• Carlos Valdes as Cisco Ramon
• Stephen Amell as Oliver Queen/Green Arrow and Oliver
• Victor Garber as Martin Stein/Firestorm
• Jesse L. Martin as Joe West
• Emily Bett Rickards as Felicity Smoak
• Caity Lotz as Sara Lance
• Tom Cavanagh as Harrison "Harry" Wells and Eobard Thawne/Reverse-Flash
• Dominic Purcell as Mick Rory
• Candice Patton as Iris West
• Franz Drameh as Jefferson Jackson/Firestorm
• Danielle Panabaker as Caitlin Snow/Killer Frost
• Carlos Valdes as Cisco Ramon
• Keiynan Lonsdale as Wally West

Recurring cast

• Sharon Leal as M'gann M'orzz/Miss Martian
• Brenda Strong as Lillian Luthor
• Andrea Brooks as Eve Teschmacher
• Curtis Lum as Demos
• Erica Durance as Alura Zor-El
• Adrian Pasdar as Morgan Edge
• Carl Lumbly as M'yrnn J'onzz
• Emma Tremblay as Ruby Arias
• Amy Jackson as Imra Ardeen/Saturn Girl
• Jesse Rath as Brainiac 5

Synopsis

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.

Confirmed plot points

• The "New 52" Supergirl villain known as Reign has been confirmed to be the season's "Big Bad".
• Project Cadmus will continue its war against the D.E.O. and Supergirl.
• The plot of the third season will revolve around what "means to be human", being something that will be addressed with all the characters.
• James Olsen/Guardian will have a new love interest, and will return to his roots as a journalist and photographer.
• Cat Grant will appear in multiple episodes in the season.
• Lyra Strayd will return in this season and she will appear in more episodes than the last season.
• Kara Danvers will have new upgrades in her suit.^{[citation needed]}
• Laurie Metcalf has been cast as Winn Schott's mother. She is scheduled to appear in episode 15.

Confirmed new characters

• Querl Dox/Brainiac 5: Half computer, half organic life and boasting a 12-level intellect, Brainiac 5 is a member of the Legion of Super-Heroes who travels to National City from the 31st Century to help Supergirl and the DEO battle Reign.
• Tormock: A warrior of Amazonian stature, jacked, tough and brutal, she is a fierce alien prisoner. Dangerous and angry, she gets into a violent fight.

Episodes

#	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"	David McWhirter	Gabriel Llanas & Anna Musky-Goldwyn		October 16, 2017
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.
3	"Far From the Tree"	Dermott Downs	Jessica Queller & Derek Simon		October 23, 2017
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.
4	"The Faithful"	Jesse Warn	Paula Yoo & Katie Rose Rogers		October 30, 2017
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.
5	"Damage"	Kevin Smith	Eric Carrasco & Cindy Lichtman		November 6, 2017
When multiple children get sick from lead poisoning, Morgan Edge points the finger at Lena and blames her creation of the lead bomb she made to save National City from the Daxamites. While Lena knows she never intended any harm, she fears there may have been a flaw in her design, leaving her responsible. Kara teams up with Samantha to clear Lena’s name, but it turns out to be harder than they thought. Meanwhile, Alex and Maggie make a crucial decision about the future of their relationship.
6	"Midvale"	Rob Greenlea	Caitlin Parrish & Jess Kardos		November 13, 2017
Kara and Alex head home to Midvale for a little R&R. While there, Kara recalls a painful memory of a childhood friend’s death and how that traumatic experience brought the Danvers sisters closer together.
7	"Wake Up"	Chad Lowe	Gabriel Llanas & Anna Musky-Goldwyn		November 20, 2017
When Winn and the team discover an alien ship has crash landed deep underwater beneath National City, Kara/Supergirl is called in to investigate. Meanwhile, Hank attempts to bond with his father, Myr’nn. Samantha, eager for some understanding of the changes she has been experiencing, looks to her estranged mother, Patricia Arias, for answers.
8	"Crisis on Earth-X, Part 1"	Larry Teng	Andrew Kreisberg & Marc Guggenheim	Robert Rovner & Jessica Queller	November 27, 2017
Barry and Iris’s wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of the superheroes band together with help from their super friends like Citizen Cold, The Ray, Felicity Smoak, Iris West and Alex Danvers to take on their most formidable villains yet. Earth’s mightiest heroes – Green Arrow, Supergirl, The Flash and White Canary – lead their teams into battle to save the world.
9	"Reign"	Glen Winter	Paula Yoo & Caitlin Parrish		December 4, 2017
Supergirl investigates a mysterious symbol popping up all over National City, tracing its origins back to an ancient prophecy and the mark of the World Killer, Reign. Meanwhile, the tension between Lena and Morgan Edge continues to build, causing James to step in and offer up some protection, and possibly igniting a spark in the process.
10	"Legion of Super-Heroes"	TBA	TBA		January 15, 2018
TBA
11	"Fort Rozz"	TBA	TBA		TBA
TBA
12	"For Good"	TBA	TBA		TBA
TBA

Gallery

Promotional images

"Flying Solo"

First look at Reign.

Videos

Supergirl Comic-Con® 2017 Trailer The CW

Supergirl Inside Supergirl Season 3 Behind The Scenes The CW

Supergirl Season 3 Inside (HD)

Supergirl Season 3 Producer's Preview (HD)

Supergirl Official Season 3 Trailer The CW

DCTV Crisis on Earth-X Crossover Teaser - The Flash, Arrow, Supergirl, DC's Legends of Tomorrow (HD)

Crisis on Earth-X Weapon Trailer The CW

Crisis On Earth-X Sizzle The CW

Supergirl Catch Up The CW