S01E03: Fight or Flight
Supergirl’s powers are tested when Reactron, one of Superman’s formidable enemies, arrives in National City and targets the young hero. Also, Cat plans to run an exposé on Supergirl.
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
