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Supergirl Episodes

The Quest for Peace

Season 4 Episode 22

Air Date: 2019-05-19

Lex Luthor (guest star Jon Cryer) descends upon Washington, DC and summons Lena (Katie McGrath) and Lillian Luthor (guest star Brenda Strong) to the White House. Supergirl (Melissa Benoist) realizes she has one last chance to stop Lex and turns to the power of the press to help her....

Red Dawn

Season 4 Episode 21

Air Date: 2019-05-12

Kara (Melissa Benoist) comes face to face with Red Daughter and the two engage in an epic battle. Determined to find a way to extract the Harun-El, Lena (Katie McGrath) turns to an unlikely source for help – Lillian Luthor (guest star Brenda Strong)....

Will The Real Miss Tessmacher Please Stand Up?

Season 4 Episode 20

Air Date: 2019-05-05

Kara (Melissa Benoist) and Lena (Katie McGrath) head to Kaznia to hunt down Lex. However, Eve Tessmacher (guest star Andrea Brooks) sets a trap for the duo that could ultimately reveal that Kara is Supergirl....

American Dreamer

Season 4 Episode 19

Air Date: 2019-04-28

As Kara doggedly works as a reporter to clear Supergirl's name, Dreamer picks up the slack as National City's protector, which leads to a showdown with Ben Lockwood....

Crime and Punishment

Season 4 Episode 18

Air Date: 2019-04-21

Supergirl and Lena head to Stryker’s Island to search for clues on how to defeat Lex....

All About Eve

Season 4 Episode 17

Air Date: 2019-03-31

Supergirl must deal with the destructive aftermath of Lex's nefarious plans....

The House of L

Season 4 Episode 16

Air Date: 2019-03-24

In the wake of Lex Luthor's return, the show flashes back to what he's been doing for the last two years and how his secret machinations and plans have affected Supergirl and Lena...

O Brother, Where Art Thou?

Season 4 Episode 15

Air Date: 2019-03-17

Secretly furloughed from prison due to failing health, Lex Luthor visits his sister, Lena, to seek her help finding a cure....

Stand And Deliver

Season 4 Episode 14

Air Date: 2019-03-10

Between Ben Lockwood’s new push to stir up the anti-alien movement and the Elite’s desire to target Lockwood and his minions, Supergirl is concerned about the safety of the American people – both human and alien....

What’s So Funny About Truth, Justice, and the American Way?

Season 4 Episode 13

Air Date: 2019-03-03

Manchester Black breaks out of prison with the help of his new team, The Elite, who are set on punishing the anti-alien forces....


Season 4 Episode 12

Air Date: 2019-02-17

With his P.I. shingle newly hung outside his office, J'onn welcomes new clients....

Blood Memory

Season 4 Episode 11

Air Date: 2019-01-27

Kara joins Nia on a trip to Nia’s hometown to visit her family during the town’s annual Harvest Festival....

Suspicious Minds

Season 4 Episode 10

Air Date: 2019-01-20

Colonel Haley is upset after Supergirl responds to a distress call from a Navy ship that turned out to be a deadly alien attack....

Elseworlds, Part 3

Season 4 Episode 9

Air Date: 2018-12-11

Supergirl, The Flash, Green Arrow and Superman engage in the battle of their lives....

Bunker Hill

Season 4 Episode 8

Air Date: 2018-12-02

Nia has a powerful dream about Agent Liberty but refuses to look at it as a prophetic dream and pushes it aside....

Rather the Fallen Angel

Season 4 Episode 7

Air Date: 2018-11-25

James falls in deeper with the Children of Liberty in his efforts to meet Agent Liberty...

Call to Action

Season 4 Episode 6

Air Date: 2018-11-18

Everyone gathers for Thanksgiving but Kara is feeling down after her televised debate with Ben Lockwood about the anti-alien sentiment coursing through National City....

Parasite Lost

Season 4 Episode 5

Air Date: 2018-11-11

Colonel Haley makes a surprising decision regarding Supergirl...


Season 4 Episode 4

Air Date: 2018-11-04

When Supergirl needs help, Alex asks Lena and Brainiac to team up....

Man of Steel

Season 4 Episode 3

Air Date: 2018-10-28

Ben Lockwood (Sam Witwer) didn’t always hate aliens....

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