S03E04: The Faithful
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.
Previous Episode 
Season 1
Pilot
S1E1 / 26 Oct 2015
Stronger Together
S1E2 / 02 Nov 2015
Fight or Flight
S1E3 / 09 Nov 2015
Livewire
S1E4 / 16 Nov 2015
How Does She Do It?
S1E5 / 23 Nov 2015
Red Faced
S1E6 / 30 Nov 2015
Human for a Day
S1E7 / 07 Dec 2015
Hostile Takeover
S1E8 / 14 Dec 2015
Blood Bonds
S1E9 / 04 Jan 2016
Childish Things
S1E10 / 18 Jan 2016
Strange Visitor from Another Planet
S1E11 / 25 Jan 2016
Bizarro
S1E12 / 01 Feb 2016
For The Girl Who Has Everything
S1E13 / 08 Feb 2016
Truth, Justice and the American Way
S1E14 / 22 Feb 2016
Solitude
S1E15 / 29 Feb 2016
Falling
S1E16 / 14 Mar 2016
Manhunter
S1E17 / 21 Mar 2016
Worlds Finest
S1E18 / 28 Mar 2016
Myriad
S1E19 / 11 Apr 2016
Better Angels
S1E20 / 18 Apr 2016
Season 2
The Adventures of Supergirl
S2E1 / 10 Oct 2016
The Last Children of Krypton
S2E2 / 17 Oct 2016
Welcome to Earth
S2E3 / 24 Oct 2016
Survivors
S2E4 / 31 Oct 2016
Crossfire
S2E5 / 07 Nov 2016
Changing
S2E6 / 14 Nov 2016
The Darkest Places
S2E7 / 21 Nov 2016
Medusa (I)
S2E8 / 28 Nov 2016
Supergirl Lives
S2E9 / 23 Jan 2017
We Can Be Heroes
S2E10 / 30 Jan 2017
The Martian Chronicles
S2E11 / 06 Feb 2017
Luthors
S2E12 / 13 Feb 2017
Mr. & Mrs. Mxyzptlk
S2E13 / 20 Feb 2017
Homecoming
S2E14 / 27 Feb 2017
Exodus
S2E15 / 06 Mar 2017
Star-Crossed (I)
S2E16 / 20 Mar 2017
Distant Sun
S2E17 / 27 Mar 2017
Ace Reporter
S2E18 / 24 Apr 2017
Alex
S2E19 / 01 May 2017
City of Lost Children
S2E20 / 08 May 2017
Resist
S2E21 / 15 May 2017
Nevertheless, She Persisted
S2E22 / 22 May 2017
Season 3
Girl of Steel
S3E1 / 09 Oct 2017
Triggers
S3E2 / 16 Oct 2017
Far From the Tree
S3E3 / 23 Oct 2017
The Faithful
S3E4 / 30 Oct 2017
Damage
S3E5 / 06 Nov 2017
Midvale
S3E6 / 13 Nov 2017
Wake Up
S3E7 / 20 Nov 2017
Crisis on Earth-X (I)
S3E8 / 27 Nov 2017
Reign
S3E9 / 04 Dec 2017
Legion of Superheroes
S3E10 / 15 Jan 2018
Fort Rozz
S3E11 / 22 Jan 2018
For Good
S3E12 / 29 Jan 2018
Both Sides Now
S3E13 / 05 Feb 2018
Schott Through the Heart
S3E14 / 16 Apr 2018
In Search of Lost Time
S3E15 / 23 Apr 2018
Of Two Minds
S3E16 / 30 Apr 2018
Trinity
S3E17 / 07 May 2018
Shelter from the Storm
S3E18 / 14 May 2018
The Fanatical
S3E19 / 21 May 2018
Dark Side of the Moon
S3E20 / 28 May 2018
Not Kansas
S3E21 / 04 Jun 2018
Make It Reign
S3E22 / 11 Jun 2018
Battles Lost and Won
S3E23 / 18 Jun 2018
Season 4
American Alien
S4E1 / 14 Oct 2018
Fallout
S4E2 / 21 Oct 2018
Man of Steel
S4E3 / 28 Oct 2018
Ahimsa
S4E4 / 04 Nov 2018
Parasite Lost
S4E5 / 11 Nov 2018
Call to Action
S4E6 / 18 Nov 2018
Rather the Fallen Angel
S4E7 / 25 Nov 2018
Bunker Hill
S4E8 / 02 Dec 2018
Elseworlds (III)
S4E9 / 11 Dec 2018
Suspicious Minds
S4E10 / 20 Jan 2019
Blood Memory
S4E11 / 27 Jan 2019
Menagerie
S4E12 / 17 Feb 2019
What's So Funny About Truth, Justice, and the American Way?
S4E13 / 03 Mar 2019
Stand and Deliver
S4E14 / 10 Mar 2019
O Brother, Where Art Thou?
S4E15 / 17 Mar 2019
The House of L
S4E16 / 24 Mar 2019
All About Eve
S4E17 / 31 Mar 2019
Crime and Punishment
S4E18 / 21 Apr 2019
American Dreamer
S4E19 / 28 Apr 2019
Will The Real Miss Tessmacher Please Stand Up?
S4E20 / 05 May 2019
Red Dawn
S4E21 / 12 May 2019
The Quest for Peace
S4E22 / 19 May 2019
Season 5
Event Horizon
S5E1 / 06 Oct 2019
Stranger Beside Me
S5E2 / 13 Oct 2019
Blurred Lines
S5E3 / 20 Oct 2019
In Plain Sight
S5E4 / 27 Oct 2019
Dangerous Liaisons
S5E5 / 03 Nov 2019
Confidence Women
S5E6 / 10 Nov 2019
Tremors
S5E7 / 17 Nov 2019
The Wrath of Rama Khan
S5E8 / 01 Dec 2019
Crisis on Infinite Earths: Part One (I)
S5E9 / 08 Dec 2019
The Bottle Episode
S5E10 / 19 Jan 2020
Back from the Future (1)
S5E11 / 26 Jan 2020
Back from the Future (2)
S5E12 / 16 Feb 2020
It's a Super Life
S5E13 / 23 Feb 2020
The Bodyguard
S5E14 / 08 Mar 2020
Reality Bytes
S5E15 / 15 Mar 2020
Alex in Wonderland
S5E16 / 22 Mar 2020
Deus Lex Machina
S5E17 / 03 May 2020
The Missing Link
S5E18 / 10 May 2020
Immortal Kombat
S5E19 / 17 May 2020
Season 6
Rebirth
S6E1 / 30 Mar 2021
A Few Good Women
S6E2 / 06 Apr 2021
Phantom Menaces
S6E3 / 13 Apr 2021
Lost Souls
S6E4 / 20 Apr 2021
Prom Night! (1)
S6E5 / 27 Apr 2021
Prom Again! (2)
S6E6 / 04 May 2021
Fear Knot
S6E7 / 11 May 2021
Welcome Back, Kara
S6E8 / 24 Aug 2021
Dream Weaver
S6E9 / 31 Aug 2021
Still I Rise
S6E10 / 07 Sep 2021
Mxy in the Middle
S6E11 / 14 Sep 2021
Blind Spots
S6E12 / 21 Sep 2021
The Gauntlet
S6E13 / 28 Sep 2021
Magical Thinking
S6E14 / 05 Oct 2021
Hope for Tomorrow
S6E15 / 12 Oct 2021
Nightmare in National City
S6E16 / 19 Oct 2021
I Believe in a Thing Called Love
S6E17 / 26 Oct 2021
Truth or Consequences
S6E18 / 02 Nov 2021
The Last Gauntlet
S6E19 / 09 Nov 2021
Kara
S6E20 / 09 Nov 2021
Melissa Benoist
Kara Danvers / Supergirl / Kara Zor-El
Chyler Leigh
Alex Danvers / Sentinel
David Harewood
J'onn J'onzz / Martian Manhunter
Katie McGrath
Lena Luthor
Jesse Rath
Querl 'Brainy' Dox / Brainiac-5
Nicole Maines
Nia Nal / Dreamer
Azie Tesfai
Kelly Olsen / Guardian
