Search Icon

Supergirl Season 4

The CW Rent or Buy
Here's where to watch every episode of Supergirl season 4. Mouseover or tap an episode to see where to stream it. Click or tap the play icon to stream it on the best available service.
Season 04, Episode 01 American Alien

S04 E01

Oct 15, 2018
view more

American Alien Oct 15, 2018 Diving back into reporting, Kara welcomes a new cub reporter to CatCo. Meanwhile, James and Lena argue about James’ impending indictment for acting as the vigilante Guardian, while Alex and Brainy struggle to get in sync at the DEO. Supergirl is called into action when remnants of the anti-alien terrorist organization Cadmus try to assassinate pro-alien leaders, but their endgame turns out to be much more sinister than she expected. J’onn relishes his peaceful new life, but an outing with an old friend causes him concern.

play button
Season 04, Episode 02 Fallout

S04 E02

Oct 22, 2018
view more

Fallout Oct 22, 2018 A shocking revelation causes chaos in National City. Supergirl sets out to capture Mercy Graves, while Alex takes control at the DEO. Back at CatCo, Kara decides to write an investigative story on Mercy and asks Lena if she can interview her as Mercy has ties to the Luthors. Meanwhile, Brainy meets Nia and the two end up in a precarious situation.

play button
Season 04, Episode 03 Man of Steel

S04 E03

Oct 29, 2018
view more

Man of Steel Oct 29, 2018 Ben Lockwood didn't always hate aliens. Through a series of incidents, and input from his anti-alien father, Ben slowly transforms from a mild-mannered professor into the villainous Agent Liberty of today.

play button
Season 04, Episode 04 Ahimsa

S04 E04

Nov 5, 2018
view more

Ahimsa Nov 5, 2018 When Supergirl needs help, Alex asks Lena and Brainiac to team up. Meanwhile, J’onn questions his decision to quit the DEO. However, after running into Manchester Black, he realizes there are a lot of ways to help his fellow aliens during this tumultuous time.

play button
Season 04, Episode 05 Parasite Lost

S04 E05

Nov 12, 2018
view more

Parasite Lost Nov 12, 2018 Colonel Haley makes a surprising decision regarding Supergirl. Kara writes a series of articles highlighting aliens in National City in the hopes that humans will stop being so fearful of them. Unfortunately, the article puts some of the aliens in harm’s way.

play button
Season 04, Episode 06 Call to Action

S04 E06

Nov 19, 2018
view more

Call to Action Nov 19, 2018 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. Meanwhile, James and Lena argue about the best way to handle the Children of Liberty.

play button
|
Season 04, Episode 07 Rather the Fallen Angel

S04 E07

Nov 26, 2018
view more

Rather the Fallen Angel Nov 26, 2018 James falls in deeper with the Children of Liberty in his efforts to meet Agent Liberty. Meanwhile, Supergirl and Manchester Black follow a lead on Agent Liberty’s location, but things take a dark turn. Lena kicks off her first set of trials.

play button
|
Season 04, Episode 08 Bunker Hill

S04 E08

Dec 3, 2018
view more

Bunker Hill Dec 3, 2018 Nia has a powerful dream about Agent Liberty but refuses to look at it as a prophetic dream and pushes it aside. After noticing something is bothering Nia, Kara enlists Brainy's help, and the two try to persuade Nia to embrace her destiny. Meanwhile, Manchester Black pays Ben Lockwood a menacing visit.

play button
Season 04, Episode 09 Elseworlds (III)

S04 E09

Dec 12, 2018
view more

Elseworlds (III) Dec 12, 2018 Supergirl, The Flash, Green Arrow and Superman engage in the battle of their lives.The crossover starts on The Flash S05E09 Elseworlds (I) and Arrow S07E09 Elseworlds (II).

play button
|
Season 04, Episode 10 Suspicious Minds

S04 E10

Jan 21, 2019
view more

Suspicious Minds Jan 21, 2019 Colonel Haley is upset after Supergirl responds to a distress call from a Navy ship that turned out to be a deadly alien attack. Colonel Haley reclaims the site as DEO territory and demands that Supergirl step aside. After Supergirl refuses to be told what to do, Haley refocuses her energy on finding out Supergirl's true identity and begins to interrogate all DEO agents, including Alex. Meanwhile, Brainiac-5 tries to persuade Nia to embrace her superpowers but she misinterprets his motives.

play button
|
Season 04, Episode 11 Blood Memory

S04 E11

Jan 28, 2019
view more

Blood Memory Jan 28, 2019 Kara joins Nia on a trip to Nia's hometown to visit her family during the town's annual Harvest Festival. While home, Nia's mother encourages her daughter to embrace her destiny. Meanwhile, Alex deals with a street drug that is turning people violent and giving them temporary superpowers.

play button
|
Season 04, Episode 12 Menagerie

S04 E12

Feb 18, 2019
view more

Menagerie Feb 18, 2019 With his P.I. shingle newly hung outside his office, J'onn welcomes new clients. Trying to take her mind off what happened at the DEO, Kara decides to team up with J'onn on his latest assignment, which unfortunately ends up tying directly into Alex's current investigation that involves the villain Menagerie. Meanwhile, Lena shares some news with James, but his reaction isn't what she expected. Nia invites Brainy to her Valentine's Day party.

play button
|
Season 04, Episode 13 What's So Funny About Truth, Justice, and the American Way?

S04 E13

Mar 3, 2019
view more

What's So Funny About Truth, Justice, and the American Way? Mar 3, 2019 Manchester Black breaks out of prison with the help of his new team, The Elite, who are set on punishing the anti-alien forces. Supergirl pulls double duty as she tries to apprehend Manchester Black and his team as well as deal with a shocking new development with Ben Lockwood.

Not Available
Season 04, Episode 14 Stand and Deliver

S04 E14

Mar 10, 2019
view more

Stand and Deliver Mar 10, 2019

Not Available
Season 04, Episode 15 O Brother, Where Art Thou?

S04 E15

Mar 17, 2019
view more

O Brother, Where Art Thou? Mar 17, 2019 Lex Luthor reaches out from prison to enlist Lena into one of his plans and will stop at nothing to get her on board, even if that means leveraging the life of one of her friends.

Not Available