Where to watch Supergirl Season 4
Supergirl season 4 is streaming in Australia on HBO Max (subscription). You can also buy it on Apple TV from $29.99 and Fetch TV from $44.99. Season 4 was released on 14 October 2018.
We may earn a commission when you sign up through our links. How we make money.
Stream (subscription)
Stream now on HBO MaxHBO Max
Subscription
From $11.99/mth
Buy or rent
Stream now on Apple TVApple TV
Buy
Buy from $29.99 a season
Get Fetch on Fetch TVFetch TV
Buy
Buy from $44.99 a season
Availability checked 4 November 2026. Streaming availability data from JustWatch.
Supergirl Season 4 episodes
S04 E01
American Alien
40 mins · Sun, 14 Oct 2018
As Kara welcomes a new reporter to CatCo, Supergirl is called in to deal with remnants of the anti-alien terrorist organisation Cadmus, attempting to assassinate pro-alien leaders.
S04 E02
Fallout
40 mins · Sun, 21 Oct 2018
Supergirl is on the hunt to capture Mercy Graves, while a shocking revelation throws National City into chaos. Deciding to pen an investigative story on Mercy, Kara reaches out to Lena for information.
S04 E03
Man of Steel
39 mins · Sun, 28 Oct 2018
Ben Lockwood begins a slow transformation from a mild-mannered professor into the nefarious Agent Liberty.
S04 E04
Ahimsa
40 mins · Sun, 4 Nov 2018
When Supergirl requires help, Alex asks Brainiac and Lena to work together. J'onn starts to question his decision.
S04 E05
Parasite Lost
40 mins · Sun, 11 Nov 2018
Colonel Haley makes a surprising decision about Supergirl. Kara tries to make humans less fearful of aliens by penning a series of articles highlighting aliens in National City, but it puts some aliens in harms way.
S04 E06
Call to Action
40 mins · Sun, 18 Nov 2018
As everyone gets together for Thanksgiving, Kara feels down after her televised debate with Ben Lockwood. James and Lena have a disagreement over the best way to handle the Children of Liberty.
S04 E07
Rather the Fallen Angel
40 mins · Sun, 25 Nov 2018
James finds himself getting deeper with the Children of Liberty in his attempts to meet Agent Liberty. Supergirl and Manchester Black look into a lead on Agent Liberty's location, while Lena begins her first set of trials.
S04 E08
Bunker Hill
40 mins · Sun, 2 Dec 2018
Nia experiences a powerful dream about Agent Liberty but doesn't want to acknowledge it as a prophetic dream. Kara and Brainy attempt to persuade Nia to embrace her destiny and Manchester Black pays Ben Lockwood an ominous visit.
S04 E09
Elseworlds, Part 3
40 mins · Tue, 11 Dec 2018
Supergirl, The Flash, Green Arrow and Superman find themselves caught in the biggest battle of their lives.
S04 E10
Suspicious Minds
40 mins · Sun, 20 Jan 2019
Haley is determined to uncover Supergirl's true identity when she refuses to be ordered around; Brainiac-5 encourages Nia to embrace her powers.
S04 E11
Blood Memory
40 mins · Sun, 27 Jan 2019
Kara and Nia go to Nia's hometown to see her family during the annual Harvest festival; Alex deals with a street drug that makes people violent and gives them temporary superpowers.
S04 E12
Menagerie
40 mins · Sun, 17 Feb 2019
Kara and J'onn work together on an assignment, which ends up being connected to Alex's current investigation involving the villain Menagerie; Nia invites Brainy to a Valentine's Day event.
S04 E13
What's So Funny About Truth, Justice, and the American Way?
40 mins · Sun, 3 Mar 2019
When a new team helps Manchester Black to break out of prison, Supergirl sets out to apprehend them; a shocking new development regarding Ben Lockwood is revealed.
S04 E14
Stand and Deliver
42 mins · Sun, 10 Mar 2019
The aliens decide to have their own peaceful protest when Lockwood organises a rally. J'onn and Brainiac join the alien march, while Supergirl and Dreamer work to protect everyone.
S04 E15
O Brother, Where Art Thou?
40 mins · Sun, 17 Mar 2019
Secretly removed from prison due to declining health, Lex Luthor meets with his sister to get her help. Lena is wary of Lex's motives, but when she is faced with a critical situation, she is forced to decide how she really feels about her brother.
S04 E16
The House of L
40 mins · Sun, 24 Mar 2019
Flashbacks reveal what Lex Luthor has been doing for the past two years, including how his evil plans have affected Supergirl and Lena.
S04 E17
All About Eve
40 mins · Sun, 31 Mar 2019
Supergirl is forced to clean up the mess of Lex's heinous plans. Taken aback by what Lex has made, Supergirl deals with her biggest challenge yet.
S04 E18
Crime and Punishment
40 mins · Sun, 21 Apr 2019
Kara and Lena travel to Stryker's Island to look for clues on how to vanquish Lex. Kara attempts to connect with an inmate who may have information about Lex's plans.
S04 E19
American Dreamer
40 mins · Sun, 28 Apr 2019
Kara struggles to clear Supergirl's name; Dreamer picks up the workload of protecting the city; James decides to take drastic measures to cope with his PTSD.
S04 E20
Will the Real Miss Tessmacher Please Stand Up?
40 mins · Sun, 5 May 2019
Kara and Lena go to Kaznia in an attempt to hunt down Lex. Alex receives a long-awaited phone call. Eve Tessmacher sets a trap that could reveal Supergirl's identity.
S04 E21
Red Dawn
40 mins · Sun, 12 May 2019
Kara faces off against the Red Daughter. Lena searches for help from an unlikely source. Alex begins to wonder why there are holes in her memory.
S04 E22
The Quest for Peace
40 mins · Sun, 19 May 2019
In Washington, DC, Lex Luther summons Lena and Lillian Luther to the White House. Meanwhile, Supergirl goes to the press for help when she realises that she has one last shot to stop Lex Luther.