<Tr> <Th> 42 </Th> <Td> 22 </Td> <Td> "Nevertheless, She Persisted" </Td> <Td> Glen Winter </Td> <Td> Story by: Andrew Kreisberg & Jessica Queller Teleplay by: Robert Rovner & Caitlin Parrish </Td> <Td> May 22, 2017 (2017 - 05 - 22) </Td> <Td> T13. 20172 </Td> <Td> 2.12 </Td> </Tr> <Tr> <Td_colspan="8"> It is revealed that Rhea used Silver Kryptonite to manipulate Kal's senses, showing Kara as General Zod . Kara eventually overpowers Kal and takes him to the Fortress, where a recovered Kal finds a way to end the war . Kara challenges Rhea to Dakkam Ur, an ancient rite in which two leaders duel and the loser concedes the war, accepted by Rhea . Lillian helps Lena build a device capable of dispersing lead, which is lethal to Daxamites, including Mon - El . With the approval of Mon - El, Kara tells the DEO to use the device if she loses . During the duel, Rhea resumes the invasion . J'onn wakes up and joins the battle . M'gann returns with other benevolent White Martians, who engage Daxamites . With Rhea claiming she will not stop the invasion, even if she loses, Kara launches the device, killing Rhea and forcing the fleet to leave . Before Mon - El can succumb, Kara boards him in a pod and sends him away from the Earth . Cat reassumes her position in CatCo, and Alex asks Maggie to marry her . In deep space, Mon - El's pod is drawn into a wormhole . In flashbacks to the destruction of Krypton, an unknown faction sends another infant to Earth in order to "reign". </Td> </Tr> <Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> Prod . code </Th> <Th> U.S. viewers (millions) </Th> </Tr> <Tr> <Th> 43 </Th> <Td> </Td> <Td> "Girl of Steel" </Td> <Td> Jesse Warn </Td> <Td> Story by: Andrew Kreisberg Teleplay by: Robert Rovner & Caitlin Parrish </Td> <Td> October 9, 2017 (2017 - 10 - 09) </Td> <Td> T13. 20651 </Td> <Td> 1.87 </Td> </Tr> <Tr> <Td_colspan="8"> Kara has been dreaming of Mon - El, obsessive with her vigilantism and ignoring downtime with others in her life . Lena and James oppose industrialist Morgan Edge on his plans for the waterfront housing estates . James is running CatCo, with Cat as White House Press Secretary and Snapper on a vacation . Kara quits CatCo, believing she needs to prioritize her vigilantism, pushing away Alex, who is marrying Maggie . Edge hires criminal Bloodsport, who attacks the unveiling of a Supergirl statue by the waterfront with a submarine, forcing Kara to go underwater to stop them . When she passes out, her dream of Mon - El rallies her and she stops the plot . In order to nullify Edge's attempts to buy CatCo and silence it, Lena buys it herself . Kara decides to return to CatCo and joins her friends . Meanwhile, Samantha Arias, a woman whom Alex helped at the waterfront, wakes up after a dream with a disturbing creature . </Td> </Tr> <Tr> <Th> 44 </Th> <Td> </Td> <Td> "Triggers" </Td> <Td> David McWhirter </Td> <Td> Gabriel Llanas & Anna Musky - Goldwyn </Td> <Td> October 16, 2017 (2017 - 10 - 16) </Td> <Td> T13. 20652 </Td> <Td> 1.76 </Td> </Tr> <Tr> <Td_colspan="8"> Kara battles a powerful metahuman bank robber called Psi, who can evoke her victims' deepest fears, forcing the former to struggle with her memories of Krypton's destruction and her guilt over Mon - El . After Winn's psychic dampener fails, Kara overcomes her fear and arrests Psi . Lena decides to run CatCo personally, taking James by surprise and creating friction with Kara, who initially has difficulty separating work and their friendship . Samantha Arias's daughter, Ruby, deliberately puts herself in danger to test whether her mother has superpowers; however, she is rescued by Kara . Samantha learns she cannot summon her powers without stress . It is revealed that she is Lena's replacement at L - Corp . Alex learns that Maggie does not want children . J'onn receives a telepathic summons from M'gann, urging him to come to Mars immediately . </Td> </Tr> <Tr> <Th> 45 </Th> <Td> </Td> <Td> "Far From the Tree" </Td> <Td> Dermott Downs </Td> <Td> Jessica Queller & Derek Simon </Td> <Td> October 23, 2017 (2017 - 10 - 23) </Td> <Td> T13. 20653 </Td> <Td> 1.76 </Td> </Tr> <Tr> <Td_colspan="8"> J'onn tells Kara and Alex about M'gann's message, and the latter convinces him to take Kara for help . The duo journey to Mars in his spaceship, encountering M'gann and the "resistance". They reveal to have found J'onn's father, M'yrnn, who was forced to give the government the location of the Staff of Kolar, a psychic weapon that can defeat the resistance . J'onn rescues M'yrnn, who initially believes J'onn is a White Martian in disguise . Eventually, Kara convinces M'yrnn to let J'onn prove his identity . Having acquired the location, the resistance defeats the government operatives and recovers the Staff, which is entrusted to J'onn, who returns to Earth with M'yrnn and Kara . Meanwhile, Eliza throws Alex and Maggie a bridal shower . Alex convinces Maggie to invite her father, who arrives, but still cannot tolerate her homosexuality . She tells him that she no longer needs him because she has a family who accepts her . However, she tells Alex that she still does not want children . </Td> </Tr> <Tr> <Th> 46 </Th> <Td> </Td> <Td> "The Faithful" </Td> <Td> Jesse Warn </Td> <Td> Paula Yoo & Katie Rose Rogers </Td> <Td> October 30, 2017 (2017 - 10 - 30) </Td> <Td> TBA </Td> <Td> 1.82 </Td> </Tr> <Tr> <Td_colspan="8"> In a flashback to when Kara saved Alex in the plane crash, a grieving passenger named Thomas Coville is inspired by her . In the present, Kara attends an ostensible self - help meeting with Winn and James and discover a "cult" made up of people she has previously saved . Led by Coville, they all worship Supergirl and follow the teachings of the Kryptonian God, Rao . Those who want to join cause disasters just so Supergirl will save them . Coville recognizes Kara in her alter - ego when she confronts him . The group later attempt to blow up a stadium with thousands of people . Kara tries to stop them, but finds they have Kryptonite inside the bomb, which she uses to wound herself and disillusion the cult . After Alex throws away the Kryptonite, Kara burns a deep hole into the ground, which Coville and Alex push the bomb into for a safe detonation . An incarcerated Coville advises Kara to follow Rao to find her path . Meanwhile, Samantha has problems coordinating her job and her daughter . She eventually has a vision of a monstrous creature in her house, telling her she soon will "reign". Alex reveals to Kara that while Maggie does not want children, she does . </Td> </Tr> <Tr> <Th> 47 </Th> <Td> 5 </Td> <Td> "Damage" </Td> <Td> Kevin Smith </Td> <Td> Eric Carrasco & Cindy Lichtman </Td> <Td> November 6, 2017 (2017 - 11 - 06) </Td> <Td> T13. 20654 </Td> <Td> TBD </Td> </Tr> <Tr> <Th> 48 </Th> <Td> 6 </Td> <Td> "Midvale" </Td> <Td> Rob Greenlea </Td> <Td> Caitlin Parrish & Jess Kardos </Td> <Td> November 13, 2017 (2017 - 11 - 13) </Td> <Td> TBA </Td> <Td> TBD </Td> </Tr> <Tr> <Th> 49 </Th> <Td> 7 </Td> <Td> "Wake Up" </Td> <Td> Chad Lowe </Td> <Td> TBA </Td> <Td> November 20, 2017 (2017 - 11 - 20) </Td> <Td> TBA </Td> <Td> TBD </Td> </Tr> <Tr> <Th> 50 </Th> <Td> 8 </Td> <Td> TBA </Td> <Td> Larry Teng </Td> <Td> TBA </Td> <Td> November 27, 2017 (2017 - 11 - 27) </Td> <Td> TBA </Td> <Td> TBD </Td> </Tr> <Tr> <Td_colspan="8"> This episode begins the crossover event "Crisis on Earth - X" that will continue on Arrow season 6 episode 8, followed by The Flash season 4 episode 8 and conclude on Legends of Tomorrow season 3 episode 8 . </Td> </Tr> </Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> Prod . code </Th> <Th> U.S. viewers (millions) </Th> </Tr>

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