Home > Supergirl > Season 3 « TV Series Page Supergirl: Season 3 (2017 - 2018) SEASON: Season 3 Season 1 Season 2 Season 3 Season 4 Episode List All Critics | Top Critics TOMATOMETER 77% Average Rating: 6.9/10 Season Reviews: 14 Fresh: 10 Rotten: 4 Critics Consensus: Heavier themes lead to higher stakes, but Supergirl gives its eponymous heroine and her fellow supers plenty of room for growth, creating a well-balanced, engaging third season. Tomatometer Not Available... —— Critic Consensus: Heavier themes lead to higher stakes, but Supergirl gives its eponymous heroine and her fellow supers plenty of room for growth, creating a well-balanced, engaging third season. AUDIENCE SCORE 56% liked it Average Rating: 3.2/5 User Ratings: 611 ADD YOUR RATING - NOT INTERESTED + WANT TO SEE Share on Facebook Post Want to See Not Interested Add Rating My Rating × Want to See Not Interested Post Share on Facebook Episodes 1 83% Girl of Steel Air date: Oct 9, 2017 Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and on the mysterious new threat against National City, as Season 3 begins. Meanwhile, Alex confesses a secret to Maggie about their impending nuptials; Lena makes a bold move; and a citizen of National City possesses a mysterious connection to Kara. More 2 79% Triggers Air date: Oct 16, 2017 Psi, a thief with psychic powers, attacks National City and is able to immobilize people by tapping into their worst fears. Meanwhile, James and Lena are at an impasse; and Samantha starts her new job at L-Corp. More 3 89% Far From the Tree Air date: Oct 23, 2017 Eliza throws Alex and Maggie a wedding shower, which causes Maggie to reach out to her estranged father. -- (C) CW More 4 92% The Faithful Air date: Oct 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. More 5 70% Damage Air date: Nov 6, 2017 Multiple children get sick from lead poisoning and Morgan Edge blames Lena for creating the lead bomb she made to save National City from the Daxamites. Meanwhile, Alex and Maggie make a crucial decision about the future of their relationship. More 6 67% Midvale Air date: Nov 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 Danver sisters closer together. More 7 78% Wake Up Air date: Nov 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; and Samantha, eager for some understanding of the changes she has been experiencing, looks to her estranged mother, Patricia Arias, for answers. More 8 93% Crisis on Earth-X, Part 1 Air date: Nov 27, 2017 Part 1 of 4. 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 join forces 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. More 9 85% Reign Air date: Dec 4, 2017 A mysterious symbol popping up all over National City is investigated. Its origins are traced 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. More 10 92% Legion of Superheroes Air date: Jan 15, 2018 Struggling to heal from her injuries inflicted by Reign, Supergirl remains in a dreamlike state, unable to be reached. Mon-El recruits one of the Legion members, Brainiac-5, to try to bring her back. Meanwhile, Reign continues her rampage on the city so the DEO teams up with the Legion of Superheroes to try to stop her. More Show More Episodes Supergirl: Season 3 Videos 2:05 Supergirl: Season 3 Comic-Con Trailer 0:30 Supergirl: Season 3 Trailer 0:30 Supergirl: Season 3 Trailer - Triggers Supergirl: Season 3 Episode 5 Preview 0:30 Supergirl: Season 3 Episode 6 Preview 0:30 Supergirl: Season 3 Episode 7 Preview 0:30 Supergirl: Season 3 Episode 9 Preview 0:20 Supergirl: Season 3 Episode 10 Preview 1:00 Supergirl: Season 3 Episode 10 Extended Preview 0:30 Supergirl: Season 3 Episode 11 Preview View All Videos (22) Supergirl: Season 3 Photos View All Photos (94) Tv Season Info In the third season of this drama series, Kara (Melissa Benoist) is struggling with the loss of her former lover, Mon-El (Chris Wood), after he is forced to depart Earth. To avoid dealing with these emotions, Kara chooses to focus on her Supergirl alter ego and must face a strange new threat against National City. Meanwhile, J'onn (David Harewood) discovers his father is still alive. Plus, Alex (Chyler Leigh) and Kara unknowingly befriend a Kryptonian survivor. Genre: Action & Adventure Network: CW Premiere Date: Oct 9, 2017 Exec. Producers: Greg Berlanti, Andrew Kreisberg, Ali Adler, Robert Rovner, Sarah Schechter Cast Melissa Benoist as Kara Danvers/Supergirl Mehcad Brooks as James Olsen Chyler Leigh as Alex Danvers Jeremy Jordan as Winslow "Winn" Schott Calista Flockhart as Cat Grant David Harewood as Hank Henshaw/J'onn J'onzz Chris Wood as Mon-El Floriana Lima as Maggie Sawyer Katie McGrath as Lena Luthor Emma Tremblay as Ruby Carl Lumbly as Myr'nn Amy Jackson as Saturn Girl Odette Annable as Reign Yael Grobglas as Psi Adrian Pasdar as Morgan Edge Brit Morgan as Livewire Betty Buckley Helen Slater as Eliza Laurie Metcalf as Mary Izabela Vidovic as Young Kara Chad Lowe as Thomas Coville Krys Marshall as Purity Anjali Jay as Serena Grant Gustin as Barry/The Flash Jesse Rath as Brainiac-5 Nesta Cooper as Tanya Candice Patton as Iris Olivia Nikkanen as Young Alex Carlos Bernard as Maggie's Father Erica Durance as Alura Wentworth Miller as Citizen Cold Russell Tovey as The Ray Emily Bett Rickards as Felicity Smoak Stephen Amell as Green Arrow Caity Lotz as White Canary Show More Cast News & Interviews for Supergirl: Season 3 Renewed and Cancelled TV Shows 2018 2018 TV Premiere Dates Calendar 2018 TV Finale Dates Calendar View All Supergirl: Season 3 News Episodes 1 83% Girl of Steel Air date: Oct 9, 2017 Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and on the mysterious new threat against National City, as Season 3 begins. Meanwhile, Alex confesses a secret to Maggie about their impending nuptials; Lena makes a bold move; and a citizen of National City possesses a mysterious connection to Kara. More 2 79% Triggers Air date: Oct 16, 2017 Psi, a thief with psychic powers, attacks National City and is able to immobilize people by tapping into their worst fears. Meanwhile, James and Lena are at an impasse; and Samantha starts her new job at L-Corp. More 3 89% Far From the Tree Air date: Oct 23, 2017 Eliza throws Alex and Maggie a wedding shower, which causes Maggie to reach out to her estranged father. -- (C) CW More 4 92% The Faithful Air date: Oct 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. More 5 70% Damage Air date: Nov 6, 2017 Multiple children get sick from lead poisoning and Morgan Edge blames Lena for creating the lead bomb she made to save National City from the Daxamites. Meanwhile, Alex and Maggie make a crucial decision about the future of their relationship. More 6 67% Midvale Air date: Nov 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 Danver sisters closer together. More 7 78% Wake Up Air date: Nov 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; and Samantha, eager for some understanding of the changes she has been experiencing, looks to her estranged mother, Patricia Arias, for answers. More 8 93% Crisis on Earth-X, Part 1 Air date: Nov 27, 2017 Part 1 of 4. 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 join forces 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. More 9 85% Reign Air date: Dec 4, 2017 A mysterious symbol popping up all over National City is investigated. Its origins are traced 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. More 10 92% Legion of Superheroes Air date: Jan 15, 2018 Struggling to heal from her injuries inflicted by Reign, Supergirl remains in a dreamlike state, unable to be reached. Mon-El recruits one of the Legion members, Brainiac-5, to try to bring her back. Meanwhile, Reign continues her rampage on the city so the DEO teams up with the Legion of Superheroes to try to stop her. More Show More Episodes Critic Reviews for Supergirl Season 3 All Critics (14) | Top Critics (0) | Fresh (10) | Rotten (4) It was just full of depressed heroes, drama and angst, and had so little actual superheroics and fun... Feb 17, 2019 | Rating: 2/5 | Full Review… David Hogan hoganreviews.co.uk The most intriguing, engaging, and spectacular season of the series to date. Sep 25, 2018 | Rating: 8/10 | Full Review… Andrew Pollard Starburst [Supergirl] uses the laziest possible storytelling tactic, and [it] annoys the hell out of me. Jul 5, 2018 | Full Review… Alyse Wax Syfy Wire There was a lot to process, in what felt like a chaotic end-cap to a very uneven season. Jul 24, 2018 | Full Review… Allison Keene Collider Light and breezy and fun, fun, fun. Jun 26, 2018 | Full Review… Matt Webb Mitovich TV Line J'onn J'onzz on Supergirl has always been delightful, but it has gotten even better this past season when they brought [in] Carl Lumby... Jun 20, 2018 | Full Review… Princess Weekes The Mary Sue Superb writing. Jun 18, 2018 | Full Review… Ja-Quan Greene Black Nerd Problems Supergirl is a show that's smarter than it's sometimes given credit for. Apr 18, 2018 | Full Review… Caroline Siede Consequence of Sound If Supergirl spends its [third] season letting Kara Danvers rediscover herself, one moment of solace at a time, it'll be a season well-spent. If not... well, it'll probably be pretty good, no matter what it does. Dec 12, 2017 | Full Review… Allison Shoemaker CBR Supergirl continues to make the case it's a much improved show with Mon-El up, up and far away. Nov 2, 2017 | Full Review… Jeffrey Lyles Lyles' Movie Files View All Critic Reviews (14) Audience Reviews for Supergirl: Season 3 There are no featured audience reviews yet. 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