<Tr> <Th> First aired </Th> <Th> Last aired </Th> <Th> Network </Th> <Th> Rank </Th> <Th> Average viewership (in millions) </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 20 </Td> <Td_colspan="1"> October 26, 2015 (2015 - 10 - 26) </Td> <Td> April 18, 2016 (2016 - 04 - 18) </Td> <Td> CBS </Td> <Td> 39 </Td> <Td> 9.81 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> October 10, 2016 (2016 - 10 - 10) </Td> <Td> May 22, 2017 (2017 - 05 - 22) </Td> <Td> The CW </Td> <Td> 129 </Td> <Td> 3.12 </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> </Th> <Td> </Td> <Td> "Pilot" </Td> <Td> Glen Winter </Td> <Td> Story by: Greg Berlanti & Ali Adler & Andrew Kreisberg Teleplay by: Ali Adler </Td> <Td> October 26, 2015 (2015 - 10 - 26) </Td> <Td> 276088 </Td> <Td> 12.96 </Td> </Tr> <Tr> <Td_colspan="8"> Before the destruction of the planet Krypton, Kal - El is sent to Earth along with his cousin Kara Zor - El . The planet's implosion forces her ship off course and into the Phantom Zone for 24 years, before landing on Earth . Kal, now operating as the vigilante "Superman" in Metropolis, puts Kara in the care of the Danvers in National City . Twelve years later, Kara, working at the media conglomerate CatCo, reveals her powers as a vigilante . She tells her co-worker, Winn Schott, about her secret and he starts aiding her . Her cold - hearted boss, Cat Grant, titles the vigilante "Supergirl". Alex, Kara's adoptive sister, is revealed to be working at the Department of Extra-Normal Operations (DEO), under the leadership of Hank Henshaw, investigating alien activity . Kara learns that there are hundreds of aliens on Earth, most of whom came from a prison that was run by her mother, Alura . Her actions attract the attention of an alien called Vartox, and she is able to defeat him, who kills himself . James Olsen, another one of Kara's colleagues, reveals that Kal sent him to look after her and presents her with a new cape . Vartox's superior is revealed to be Astra In - Ze, Alura's identical twin sister, who wants to conquer Earth . </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "Stronger Together" </Td> <Td> Glen Winter </Td> <Td> Story by: Greg Berlanti & Andrew Kreisberg Teleplay by: Andrew Kreisberg & Ali Adler </Td> <Td> November 2, 2015 (2015 - 11 - 02) </Td> <Td> 4X7602 </Td> <Td> 8.87 </Td> </Tr> <Tr> <Td_colspan="8"> In an effort to put a positive image on Supergirl in the wake of a serious mishap, Kara asks Winn and James to help her perfect her skills, while Hank and Alex put Kara through extensive physical training . Kara learns that an alien of the Hellgrammite species who escaped from Fort Rozz, Alura's prison, is on Earth searching for chlorine - based food . The DEO prepares an ambush for the Hellgrammite, but it escapes, kidnaps Alex, and takes her to Astra, who uses Alex as a trap for Kara . As Kara and Astra fight, Hank injures Astra with a Kryptonite knife and Alex kills the Hellgrammite . Learning that Kara has become more powerful than she had imagined and that humanity has a means of weakening Kryptonians, Astra muses that her "plans" may need to be postponed . Alex provides Kara with an interactive artificial intelligence of Alura's consciousness . Meanwhile, Cat pressures James to get her an interview with Supergirl . In the end, Kara agrees to the interview and prevents James from getting fired . It is also revealed that Hank might have a secret of his own when his eyes glow red . </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "Fight or Flight" </Td> <Td> Dermott Downs </Td> <Td> Michael Grassi & Rachel Shukert </Td> <Td> November 9, 2015 (2015 - 11 - 09) </Td> <Td> 4X7603 </Td> <Td> 8.07 </Td> </Tr> <Tr> <Td_colspan="8"> During the interview with Cat, Kara accidentally reveals that she is Superman's cousin . After Cat exposes the relationship, Kara is attacked by Reactron, who seeks to kill her in order to get his revenge on Superman, but she manages to send him fleeing . He later goes to LORD Technology labs and kidnaps Maxwell Lord to get him to fix his suit . Kara later learns that a reactor meltdown Superman stopped in the past killed Reactron's wife . She goes to the hideout of Reactron, identified as Ben Krull, and manages to save Maxwell, only to get badly injured by Krull afterwards, but Superman comes to save her . She gets mad at James for calling Superman for help . During a party Cat organized, Krull breaks in to find Supergirl . While James distracts Reactron, Kara covers her hand in lead so that she can use it to safely remove the power core in Krull's suit and defeat him . Kara, who has feelings for James, witnesses his ex-girlfriend, Lucy Lane, also Lois Lane's younger sister, paying him a visit to restart their relationship . </Td> </Tr> <Tr> <Th> </Th> <Td> </Td> <Td> "How Does She Do It?" </Td> <Td> Thor Freudenthal </Td> <Td> Yahlin Chang & Ted Sullivan </Td> <Td> November 23, 2015 (2015 - 11 - 23) </Td> <Td> 4X7604 </Td> <Td> 7.19 </Td> </Tr> <Tr> <Td_colspan="8"> Cat leaves town, entrusting her son Carter to Kara . A bomber starts targeting Lord's company . On the opening night of Lord's new bullet train, Kara and the DEO find out about two bomb threats simultaneously, one at the airport and one on the train . The DEO goes to the airport, where Hank secretly uses his powers to deactivate the bomb . Kara goes to the train to save Carter, who is on it with the bomber . As she confronts the bomber, he claims that he is doing it for his daughter . He requests her to save the people on the train after he starts the timer, killing himself . At DEO headquarters, Alex finds a fail - safe in the bomb defused by Hank, who claimed it was just a decoy . Kara deduces that Lord was the one behind the bombings . As Supergirl, she confronts Lord, who implies that the threats were used to test her skills . He also vows to find the person important to her on the train . Meanwhile, James initially refuses to date Lucy; but Kara convinces him to return to her . </Td> </Tr> <Tr> <Th> 5 </Th> <Td> 5 </Td> <Td> "Livewire" </Td> <Td> Kevin Tancharoen </Td> <Td> Roberto Aguirre - Sacasa & Caitlin Parrish </Td> <Td> November 16, 2015 (2015 - 11 - 16) </Td> <Td> 4X7605 </Td> <Td> 7.77 </Td> </Tr> <Tr> <Td_colspan="8"> After fighting an alien escapee, Kara meets Alex at the apartment to greet the latter's mother, Eliza, for Thanksgiving, inviting Winn due to his lack of plans . CatCo's shock jock, Leslie Willis is demoted by Cat to traffic reporting after a controversial bashing of Supergirl . During a severe thunderstorm, Kara tries to save Leslie, but lightning strikes them both, imbuing Leslie with electromagnetic powers . Leslie takes the name "Livewire" and tries to take revenge on Cat, but Kara eventually stops her and she is imprisoned at the DEO . Cat and Kara become closer . Meanwhile, Alex tells Eliza in a fit of rage at the dinner table that she's actually working for the DEO . Eliza reveals to Alex and Kara that her husband, Jeremiah, offered himself up to work for Henshaw in exchange for Kara's safety and then died mysteriously . Alex and Kara decide to investigate Henshaw and find the truth about Jeremiah's death . </Td> </Tr> <Tr> <Th> 6 </Th> <Td> 6 </Td> <Td> "Red Faced" </Td> <Td> Jesse Warn </Td> <Td> Michael Grassi & Rachel Shukert </Td> <Td> November 30, 2015 (2015 - 11 - 30) </Td> <Td> 4X7606 </Td> <Td> 8.02 </Td> </Tr> <Tr> <Td_colspan="8"> Kara hurts a civilian due to her uncontrolled anger . Sam Lane, Lucy' father and also a military general, arrives at the DEO with her as his attache, demanding Supergirl let them test her powers by fighting an android called Red Tornado, which is invented by T.O. Morrow . She overpowers Red Tornado, leading to Sam firing Morrow . Sam is later attacked by Red Tornado; but Kara saves him . The DEO realizes that Red Tornado is actually a drone controlled by Morrow . Alex and Kara engage Morrow and Red Tornado, respectively . Alex kills Morrow, making Red Tornado engage Kara without control . She uses her eyes enhanced by her rage to destroy it . Lucy resigns from military service in order to stay with James . Kara finds out that her powers have diminished when she cuts herself and starts bleeding . Meanwhile, Winn informs Kara and Alex that Jeremiah and Hank went on a mission in South America, where Jeremiah died, deducing that Hank is the last person to have seen him alive . </Td> </Tr> <Tr> <Th> 7 </Th> <Td> 7 </Td> <Td> "Human for a Day" </Td> <Td> Larry Teng </Td> <Td> Yahlin Chang & Ted Sullivan </Td> <Td> December 7, 2015 (2015 - 12 - 07) </Td> <Td> 4X7607 </Td> <Td> 7.67 </Td> </Tr> <Tr> <Td_colspan="8"> As Kara tries to adapt to life without her powers, an earthquake hits National City . Winn informs Kara that she needs a rise of adrenaline in her blood to regain her powers . The team begins saving the CatCo staff upstairs by the elevator shaft, from where James falls after saving everyone . Kara regains her powers and saves him before rushing to help the citizens . Winn becomes jealous of the intimacy between her and James . Afterwards, Kara is attacked by Astra and her operatives . Meanwhile, the earthquake causes a DEO prisoner called Jemm, who has psychic abilities to read and control minds, to escape . Hank locks the facility and takes a team to engage Jemm, with the former being the only survivor . That causes Alex to become more suspicious of Hank . She locks him in a room and engages Jemm alone, being overpowered . Hank arrives in time and kills him . He explains to her that he is the sole survivor of an alien species and his name is J'onn J'onzz . He killed the real Hank after the latter killed Jeremiah, who tried to save J'onn . He then assumed Hank's shape and identity . </Td> </Tr> <Tr> <Th> 8 </Th> <Td> 8 </Td> <Td> "Hostile Takeover" </Td> <Td> Karen Gaviola </Td> <Td> Roberto Aguirre - Sacasa & Caitlin Parrish </Td> <Td> December 14, 2015 (2015 - 12 - 14) </Td> <Td> 4X7608 </Td> <Td> 7.28 </Td> </Tr> <Tr> <Td_colspan="8"> Kara is overpowered by Astra and escapes . In a second duel, the former defeats the latter and brings her to the DEO, where the latter states that all she wanted was to save Krypton, the same thing she wants for Earth . She also reveals that Alura used Kara on Krypton to arrest the former . Kara confronts the interactive artificial intelligence of Alura, who refuses to confirm that Astra's plan could have worked . It is revealed that Astra wanted to get arrested in order to divert attention from her husband, Non, and his team from attacking LORD Technologies . Kara rushes there and engages him . Meanwhile, Cat's emails are hacked and her personal information is leaked to the press . Kara finds out that the chairman of the board was behind the hack and provides Cat with evidence by the help of James, Lucy and Winn, leading to the chairman's arrest . Kara also finds out from the leaks that Cat has a 24 - year old son named Adam Foster . Cat reveals to Kara that she has found out about the latter's alter ego . </Td> </Tr> <Tr> <Th> 9 </Th> <Td> 9 </Td> <Td> "Blood Bonds" </Td> <Td> Steve Shill </Td> <Td> Ted Sullivan & Derek Simon </Td> <Td> January 4, 2016 (2016 - 01 - 04) </Td> <Td> 4X7609 </Td> <Td> 8.75 </Td> </Tr> <Tr> <Td_colspan="8"> Non overpowers Kara and leaves with Hank . Lord sends the DEO away from his facility, vowing to defend it himself, and returns to a secret experiment he is conducting . Non offers to trade Hank for Astra, but Sam, who is placed in charge of the DEO by the President, refuses . He tortures Astra for Non's location, and walks into a trap placed by Non . Kara is distraught over both her defeat and the fact that Cat will fire her unless she is convinced that Kara is not Supergirl . Kara goes to the DEO and talks with Astra who tells her that Alura believed her claim that Krypton was doomed, but sentenced her for her illegal methods while promising to work for her cause . Alex and Kara make the trade over Lane's objections and Astra orders Non to withdraw despite his numerical advantage . Sam and his men leave the DEO . Hank uses his shape - shifting power to present Cat with Kara and Supergirl simultaneously, casting doubt on her initial deduction of their identities . Kara, James and Winn decide to find the secret about Lord, who is shown in possession of an alien woman . </Td> </Tr> <Tr> <Th> 10 </Th> <Td> 10 </Td> <Td> "Childish Things" </Td> <Td> Jamie Babbit </Td> <Td> Story by: Yahlin Chang Teleplay by: Anna Musky - Goldwyn & James DeWille </Td> <Td> January 18, 2016 (2016 - 01 - 18) </Td> <Td> 4X7610 </Td> <Td> 8.77 </Td> </Tr> <Tr> <Td_colspan="8"> Winn's father, known as the Toyman, escapes from prison, leaving the former a message to meet him . Winn tells the FBI about it . They find it a trap; but Kara saves them . Winn reveals that his father's boss, Chester Dunholtz, stole his toy designs, leading to the Toyman trying to kill Dunholtz, killing other people instead and going to jail . The Toyman kidnaps Winn, demanding him to attend a ceremony to kill Dunholtz and threatening to kill the other guests by the bombs he has planted . Kara manages to save the guests and have the Toyman arrested . Lucy accepts Cat's job offer and Winn addresses his feelings to Kara . Meanwhile, Alex goes to dinner with Maxwell, giving Hank the chance to infiltrate LORD Technologies by shapeshifting into Maxwell . He finds the woman and takes pictures, but is forced to clear a security guard's memory to escape without arousing suspicion . Maxwell is revealed to be monitoring Alex using a camera and microphone he planted on her purse . He finds out about Supergirl's identity . </Td> </Tr> <Tr> <Th> 11 </Th> <Td> 11 </Td> <Td> "Strange Visitor from Another Planet" </Td> <Td> Glen Winter </Td> <Td> Michael Grassi & Caitlin Parrish </Td> <Td> January 25, 2016 (2016 - 01 - 25) </Td> <Td> 4X7611 </Td> <Td> 7.90 </Td> </Tr> <Tr> <Td_colspan="8"> Miranda Crane, an anti-alien Senator, arrives in National City and is attacked by an alien . Kara saves Crane and brings her to the DEO, where Hank reveals to Alex that the alien is a White Martian, whose species wiped out the Green Martians, Hank's species . Kara finds out that the Crane inside the DEO is actually the White, who is a shapeshifter . The White escapes, abducting Alex . Hank proposes a trade of himself with Alex, which the White accepts . Kara interrupts the exchange, giving Hank the chance to attempt to kill the White; but Kara dissuades him and the White is incarcerated in the DEO . Crane withdraws from her anti-alien initiative . Meanwhile, Kara and Winn become distant to each other . Adam pays a visit to Cat due to receiving a letter, which was actually written by Kara . Adam and Cat find it hard to develop a relationship; but Kara later helps them reconcile . Adam asks Kara on a date, which she accepts . An identical Supergirl appears in National City . </Td> </Tr> <Tr> <Th> 12 </Th> <Td> 12 </Td> <Td> "Bizarro" </Td> <Td> John Showalter </Td> <Td> Roberto Aguirre - Sacasa & Rachel Shukert </Td> <Td> February 1, 2016 (2016 - 02 - 01) </Td> <Td> 4X7612 </Td> <Td> 6.68 </Td> </Tr> <Tr> <Td_colspan="8"> It is revealed that the new Supergirl is the woman Maxwell has been experimenting on and has brainwashed her with the sole purpose of killing the prime Supergirl . Cat titles her "Bizarro", who later witnesses Supergirl saving civilians and realizing that Supergirl is not a bad person, as Maxwell has dictated to her . However, Maxwell convinces her to continue hunting Supergirl . Bizarro attacks Kara when she is out with Adam, making her realize that Maxwell knows her identity . The DEO uses Kryptonite on Bizarro, whose face gets deformed instead and manages to escape . Kara decides to end her relationship with Adam . Maxwell advises Bizarro to use a person Supergirl cares about; so she kidnaps James . Kara arrives and engages her before Alex uses a modified Kryptonite to weaken Bizarro, who is rendered unconscious and kept in the DEO . Alex brings Maxwell to the DEO and locks him up, so he threatens Eliza indirectly . Back at her apartment, Kara is attacked by an unknown creature . </Td> </Tr> <Tr> <Th> 13 </Th> <Td> 13 </Td> <Td> "For the Girl Who Has Everything" </Td> <Td> Dermott Downs </Td> <Td> Story by: Andrew Kreisberg Teleplay by: Ted Sullivan & Derek Simon </Td> <Td> February 8, 2016 (2016 - 02 - 08) </Td> <Td> 4X7613 </Td> <Td> 7.92 </Td> </Tr> <Tr> <Td_colspan="8"> The creature, which is known as the Black Mercy, places Kara in a dreamlike state that has her imagining she is back on Krypton . The Black Mercy is part of a plot by Non, who is using Earth's technology to launch "Myriad", which he and Astra are planning to use to wipe out humanity . Astra secretly informs Alex of the Black Mercy; and the latter enlists the help of Hank, Winn, Maxwell, and James to save Kara, with Alex entering Kara's mind to pull her out and bring her back to reality . When Kara comes back, she seeks revenge on Non and stops him, who escapes with after revealing the word "Myriad". Elsewhere, Astra engages Alex and Hank, who fights as the Martian Manhunter . The former overpowers him before Alex impales her with a Kryptonite sword, killing her . Kara arrives and Hank tells her that he killed Astra instead of Alex, who starts to feel guilty over whether she should tell Kara the truth . Non vows revenge on Kara in the wake of Astra's death . </Td> </Tr> <Tr> <Th> 14 </Th> <Td> 14 </Td> <Td> "Truth, Justice and the American Way" </Td> <Td> Lexi Alexander </Td> <Td> Story by: Michael Grassi Teleplay by: Yahlin Chang & Caitlin Parrish </Td> <Td> February 22, 2016 (2016 - 02 - 22) </Td> <Td> 4X7614 </Td> <Td> 7.25 </Td> </Tr> <Tr> <Td_colspan="8"> Kara and Non pay their final respects to Astra; and he vows to kill her after he finishes mourning . Kara, Alex, and J'onn track down an armored alien known as the Master Jailer, whom they discover was a guard at Fort Rozz . He has become a vigilante who kills the alien fugitives, including those convicted of non-violent crimes such as a professor sentenced for drug smuggling . Kara confronts the Jailer, but he takes her prisoner and plans to execute her for not joining him . The DEO pinpoints their location and Kara is able to save the professor and defeat the Jailer . Alura refuses to reveal anything about Myriad and Kara realizes she cannot forgive J'onn for killing Astra . Meanwhile, Cat assigns James and Lucy to investigate Maxwell's disappearance . Tensions between James and Lucy develop after he reveals his knowledge of the DEO and friendship with Supergirl . The DEO releases Maxwell, threatening to disclose his criminal activity if he reveals Supergirl's identity or the DEO's location . Kara finds competition in Cat's new "first assistant" Siobhan Smythe . </Td> </Tr> <Tr> <Th> 15 </Th> <Td> 15 </Td> <Td> "Solitude" </Td> <Td> Dermott Downs </Td> <Td> Story by: Rachel Shukert Teleplay by: Anna Musky - Goldwyn & James DeWille </Td> <Td> February 29, 2016 (2016 - 02 - 29) </Td> <Td> 4X7615 </Td> <Td> 6.69 </Td> </Tr> <Tr> <Td_colspan="8"> A hacker steals the personal information of several people and gives it to Cat for disclosure, which she refuses . The hacker, turned out to be an alien named Indigo with the ability to use the internet for traveling, announces her decision to destroy National City . Kara leaves the DEO and enlists the help of James and Lucy to stop Indigo while the DEO enlists Winn for it . Lucy realizes that Indigo's intention in the hacking was only one person, a military general with access to the nuclear arsenal . Indigo infiltrates the nuclear base using the general's cell phone and launches a missile towards National City . Kara stops it using the DEO's help . Winn uploads a virus to Indigo, destroying her after she reveals to Kara that it was she who helped Kara's ship exit the Phantom Zone., which in turn facilitated Fort Rozz's expulsion . Kara decides to rejoin the DEO; and Alex reveals the truth about Astra, being forgiven by Kara . Lucy ends her relationship with James, accusing him of loving Kara . Winn and Siobhan develop a relationship . Non recovers Indigo's pieces and revives her . </Td> </Tr> <Tr> <Th> 16 </Th> <Td> 16 </Td> <Td> "Falling" </Td> <Td> Larry Teng </Td> <Td> Robert Rovner & Jessica Queller </Td> <Td> March 14, 2016 (2016 - 03 - 14) </Td> <Td> 4X7616 </Td> <Td> 6.53 </Td> </Tr> <Tr> <Td_colspan="8"> After helping fight a warehouse fire, Supergirl inadvertently comes into contact with Red Kryptonite which destroys her inhibitions . Kara / Supergirl soon becomes more cold, shallow and cynical around all others, which Winn, Jimmy, Alex, and even Cat wonder what is going on with her . Kara even goes as far as to frame the back - stabbing Siobhan by leaking information that Siobhan has been contacting the Daily Planet for information on Supergirl's actions which results in Cat terminating Siobhan's employment . It soon turns out that Maxwell Lord is the one responsible for he created the so - called Red Kryptonite, in the hopes of stopping Non's next attack . After Evil Supergirl makes an attempt on Cat's own life, she goes on TV and denounces Supergirl . Alex and Maxwell are forced to form an uneasy alliance while he tries to help the DEO try to stop Evil Supergirl . After a climatic battle downtown, the DEO is able to subdue and capture Evil Supergirl, but at the price of Hank revealing himself as the Martian Manhunter . </Td> </Tr> <Tr> <Th> 17 </Th> <Td> 17 </Td> <Td> "Manhunter" </Td> <Td> Chris Fisher </Td> <Td> Story by: Derek Simon Teleplay by: Cindy Lichtman & Rachel Shukert </Td> <Td> March 21, 2016 (2016 - 03 - 21) </Td> <Td> 4X7617 </Td> <Td> 6.00 </Td> </Tr> <Tr> <Td_colspan="8"> While Kara is trying to win back National City's trust, the hot - headed Marine Colonel James Harper (guest star Eddie McClintock) begins an investigation into the J'onn affair with Lucy, having re-enlisted into the Army at her previous rank of Major, as his legal assistant . Hank / J'onn J'onzz then tells the backstory about how he first met Jeremiah Danvers (guest star Dean Cain) 10 years earlier while he and Hank were on a mission in South America to find him and how J'onn took his identity to oversee the DEO . After her interrogation, the vindictive Lucy implicates Alex with her knowledge about J'onn's real identity . After learning that Hank and Alex are on their way to Project Cadmus, Kara finally tells Lucy that she is Supergirl and convinces her to help rescue Hank and Alex . Hank learns that Jeremiah is still alive, so he and Alex go on the run to find him, but not before manipulating Harper into resigning from the Marines and appointing Lucy as the acting director of the DEO . Meanwhile, Siobhan tries to get revenge on Kara for getting her fired, but gets caught by Winn and discovers that she has the power to sonic scream . </Td> </Tr> <Tr> <Th> 18 </Th> <Td> 18 </Td> <Td> "Worlds Finest" </Td> <Td> Nick Gomez </Td> <Td> Story by: Greg Berlanti Teleplay by: Andrew Kreisberg & Michael Grassi </Td> <Td> March 28, 2016 (2016 - 03 - 28) </Td> <Td> 4X7618 </Td> <Td> 7.17 </Td> </Tr> <Tr> <Td_colspan="8"> <P> Siobhan discovers that the women in her family are cursed with the spirit of a banshee, which can only be quieted by killing whoever wronged them . Deciding to kill Kara, Siobhan frees Livewire from captivity at the DEO and suggests they team up to kill both Kara and Cat . Siobhan--now calling herself Silver Banshee--and Livewire kidnap Cat and wreak havoc on National City Park . Meanwhile, Supergirl has a run - in with Barry Allen / Flash, a superhero from an alternate universe, whom she asks for his help to find Livewire and Silver Banshee . After a climatic fight in a downtown park, Kara is able to subdue them and win back National City's trust . At the end, Kara decides to reveal her romantic feelings for James only to discover that everyone in National City has fallen under some kind of spell, revealed by Non to be the result of Myriad . </P> This episode is a crossover with The Flash . </Td> </Tr> <Tr> <Th> 19 </Th> <Td> 19 </Td> <Td> "Myriad" </Td> <Td> Adam Kane </Td> <Td> Yahlin Chang & Caitlin Parrish </Td> <Td> April 11, 2016 (2016 - 04 - 11) </Td> <Td> 4X7619 </Td> <Td> 6.12 </Td> </Tr> <Tr> <Td_colspan="8"> The Myriad effect has taken over National City and even Superman is under control, leaving Kara, Cat, and Maxwell as the only ones immune . Now, Kara must find a way to stop Non, but Maxwell is looking at destroying the Kryptonians with a Kryptonite bomb even at the risk of killing other humans . Cat objects and prompts Kara to find an alternative . The effect brings fugitives Alex and J'onn back after Alex tells Eliza the truth about Jeremiah and Hank Henshaw . When Indigo senses the two returning, she defeats J'onn, but takes Alex and places her under mind control as Non's payback for Astra's death . </Td> </Tr> <Tr> <Th> 20 </Th> <Td> 20 </Td> <Td> "Better Angels" </Td> <Td> Larry Teng </Td> <Td> Story by: Andrew Kreisberg & Ali Adler Teleplay by: Robert Rovner & Jessica Queller </Td> <Td> April 18, 2016 (2016 - 04 - 18) </Td> <Td> 4X7620 </Td> <Td> 6.11 </Td> </Tr> <Tr> <Td_colspan="8"> Kara fights with Alex, who is controlled by Non . When Alex is about to kill Kara with the same Kryptonian sword used to kill Astra, their mother pleads with her to stop, breaking Non's control over Alex . The team learns that hope is the key to stopping Myriad . Supergirl inspires the citizens of National City, waking them from the Myriad trance . However, Non is convinced by Indigo to kill all the humans on Earth by increasing Myriad's frequency . Back at the DEO, Max warns Kara that she might not survive a solo fight with Non and Indigo; J'onn later insists on helping her . Kara and J'onn confront Non and Indigo at Fort Rozz, which is powering Myriad . Kara defeats Non in a heat vision battle and J'onn rips Indigo's body apart . As Indigo dies, she reveals that she locked the system so Myriad cannot be shut down . Kara flies Fort Rozz into space, rendering Myriad harmless; Alex rescues her using Kara's pod . Afterward, J'onn is reinstated as the Director of the DEO and Cat gives Kara a promotion . While Kara celebrates at her house, another pod similar to the one in which Kara came to Earth crashes near National City . Kara opens the pod and is shocked by what is inside it . </Td> </Tr> </Table>

How many episodes are in super girl season 2