Instruct: Given a question, retrieve documents that answer the question.
Query: When did the TV series Supergirl first air?
Supergirl is an American superhero action-adventure television series developed by Ali Adler, Greg Berlanti and Andrew Kreisberg (the latter two having previously created Arrow and The Flash) that originally aired on CBS and premiered on October 26, 2015. It is based on the DC Comics character Supergirl, created by Otto Binder and Al Plastino, and stars Melissa Benoist in the title role. Supergirl is a costumed superheroine who is Superman's cousin and one of the last surviving Kryptonians. The series is set in the Arrowverse, sharing continuity with the other television series of the universe.
"The Adventures of Supergirl" is the first episode and premiere of the second season from The CW television series "Supergirl", which aired on October 10, 2016. It is the first new episode of "Supergirl" to air on the CW since moving from CBS, and the first to feature a prominent appearance by Superman, portrayed by Tyler Hoechlin.
"Better Angels" is the twentieth episode and the season finale of the first season of the CBS television series "Supergirl", which aired on April 18, 2016. It is also the last new episode of "Supergirl" that aired on CBS before the show moved to The CW for its second season. The episode's teleplay was written by Yahlin Chang and Caitlin Parrish, and directed by Larry Teng.
In May 2016, after it was announced that "Supergirl" would air its second season on The CW instead of CBS, Pedowitz said that all four series—"Arrow", "The Flash", "Legends of Tomorrow", and "Supergirl"—would cross over during the 2016–17 television season. In September 2016, Greg Berlanti, creator and executive producer of all four series, said that the crossover event would only involve "The Flash", "Arrow", and "Legends of Tomorrow"; the event begins at the end of the "Supergirl" episode "Medusa", with Barry and Cisco Ramon arriving on Supergirl's Earth to recruit her. Andrew Kreisberg, executive producer on "Arrow", "The Flash", and "Supergirl", explained why the crossover did not include "Supergirl": since "Medusa" was the mid-season finale for "Supergirl" and the other three series had theirs in episodes after the crossover, they "wanted to make sure that ["Medusa"] spoke to what had been happening on the first seven episodes of "Supergirl" and not just as a tie in". He added that it would have been logistically difficult to incorporate the four series, noting that finding the time for Melissa Benoist to shoot material for the other three series was complicated. Benoist did not appear in much of "The Darkest Place", the episode before "Medusa", to make her available to appear in each of the crossover episodes. He expanded on the difficulties, saying that "built-in shut-down days" for "Supergirl" were not planned on, in part because the series switched from CBS to The CW, and that this inability to shut down normal production prevented it from having a larger role in the crossover.
In May 2018, Arrow star Stephen Amell announced at The CW upfronts that the next Arrowverse crossover would feature Batwoman and Gotham City. The crossover is slated to air in December 2018, ahead of a potential 2019 solo series for the character.[99][100] Supergirl was confirmed to have a participating episode in August, which would close out the three-part crossover, trading nights with The Flash just for the event. Therefore the show’s participating episode airs on Tuesday, December 11.[101]
Enoki Films held the North American distribution rights of TV series, under the name Nana the Supergirl, though the series was never aired in North America. The TV series has also aired in Italy, France, Germany and Russia.
"Stronger Together" is the second episode in the first season of the CBS television series "Supergirl", which aired on November 2, 2015. It was written by series developers/creators Greg Berlanti, Ali Adler and Andrew Kreisberg, and directed by Glen Winter. 
"Fight or Flight" is the third episode in the first season of the CBS television series "Supergirl", which aired on November 9, 2015. It was written by Michael Grassi and Rachel Shuker, and directed by Dermott Downs. 
In November 2017, Abrams Books began publishing a new trilogy of Supergirl novels, written by Jo Whittemore, aimed at middle-grade readers in tandem with a similar trilogy of The Flash novels.[106] The first, Supergirl: Age of Atlantis, was released on November 7, 2017, and features Supergirl dealing with a surge of new powered people in National City, as well as a mysterious humanoid sea creature captured by the DEO who is seemingly attracted by the new superpowered people.[107] A sequel, Supergirl: Curse of the Ancients, was released on May 1, 2018,[108] with a third novel, titled Supergirl: Master of Illusion, released on January 8, 2019.[109]
Despite airing on The CW and being created by Berlanti, Mark Pedowitz, president of The CW said in May 2017 that the series "at this time, is not part of the Arrowverse. It is a separate situation." Berlanti had previously stated when the series was in development at Fox that it would not crossover with his other DC Comics television properties on The CW nor would it exist in the Arrowverse. Akil later stated that they were not ruling out eventual crossovers. In August 2017, Pedowitz added, "If [the showrunners] wish to bring it in, that is their call. We had a long discussion with the studio, Mara, Salim, and myself. We were fine with them making it separate from the Arrowverse, they have a different point of view. If they end up wanting to go that way, that will be their decision." Salim Akil noted references in the first season to the Arrowverse heroes Vixen and Supergirl were a "fun" way "to tease the fans". He also further reiterated that the series existed on a separate Earth from the other Arrowverse series (like Earth-1 from "The Flash", "Arrow", and "Legends of Tomorrow" and Earth-38 from "Supergirl") and was hopeful that any future crossover would involve the heroes of the other series visiting the Earth that is associated with "Black Lightning".
"Bizarro" is the twelfth episode in the first season of the CBS television series "Supergirl", which aired on February 1, 2016. It was written by Roberto Aguirre-Sacasa and Rachel Shukert, and directed by John Showalter. 
The crossover episode received excellent reviews. Cliff Wheatley of IGN gave the episode an 8.6/10, stating "After the grim 'n' gritty "", "Supergirl" "Worlds Finest" offered a fun, upbeat palette cleanser and one of the series' strongest episodes to date. Instead of the usual "beatdown" introduction, Supergirl and the Flash went straight to being superfriends, which was refreshing. Not only did Barry Allen fit perfectly in Kara's world, but actors Grant Gustin and Melissa Benoist had fantastic chemistry together onscreen. While the city's turnaround on Supergirl's Red K incident was a little sudden, overall, "Worlds Finest" was delightful." Stacy Glanzman of TV Fanatic gave the episode a 5.0 out of 5 stars.
Composer Blake Neely returned as the primary composer for the second season. The soundtrack for the second season was released digitally on July 22, 2016 and in CD format on July 26, 2016. Neely also composed a theme when Gustin as Barry appeared on the eighteenth episode of "Supergirl", "Worlds Finest". The theme was titled "World's Finest" when it was released on the "Supergirl: Season 1" soundtrack.
"Livewire" is the fifth episode in the first season of the CBS television series "Supergirl", which aired on November 16, 2015. It was written by Roberto Aguirre-Sacasa and Caitlin Parrish, and directed by Kevin Tancharoen.
"Myriad" is the nineteenth episode in the first season of the CBS television series "Supergirl", which aired on April 11, 2016. The episode was written by Yahlin Chang & Caitlin Parrish, and directed by Adam Kane.
Brittany has worked as a casting director for TV and film. She did casting work for "The Lyon's Den" (as an intern), "Switched at Birth", "Suspect and" "Dismissed", and also worked on the tv shows "The New Normal", "The Goodwin Games", "Supergirl", and Lethal Weapon. Most recent she has done casting for the TV series "Insecure", the movies "A Wrinkle in Time, The First Purge and" Call of the Wild (2019)
The second season begins to explore the concept of the multiverse, by introducing Earth-2, which features doppelgängers of the inhabitants in the Arrowverse (or Earth-1), along with Jay Garrick, the Flash of Earth-2, and Zoom. In the episode "Welcome to Earth-2", as Barry, Cisco and Harrison Wells of Earth-2 travel to Earth-2, glimpses of the multiverse are seen, including an image of "Supergirl" star Melissa Benoist as Supergirl and an image of John Wesley Shipp as the Flash from the 1990 television series, implying the two characters and their respective television series exist on alternate Earths to the Arrowverse; "Supergirl"s world is later designated Earth-38 in the Arrowverse multiverse. Gustin as Barry appeared on the eighteenth episode of "Supergirl", "Worlds Finest", which aired on CBS on March 28, 2016. Intersecting with the events of the eighteenth episode of "The Flash", which aired on April 19, 2016, Barry accidentally arrives on Earth-38 and helps Kara battle two of her enemies, Silver Banshee (Italia Ricci) and Livewire (Brit Morgan), before returning home.
Reactron appears in the 2015 television series "Supergirl", portrayed by Chris Browning. First appearing in the series' third episode "Fight or Flight", this version is a former reactor engineer named Ben Krull who became Reactron when he was exposed to radiation after a terrorist attack which was stopped by Superman. Ben survived the radiation, but his wife Alyssa did not. Ben blames Superman for his wife's death and swore vengeance on him. He then built an advanced bio-medical exo-suit capable of firing highly concentrated bursts of energy while also giving him super strength and the ability to fly. Cat Grant leaks evidence of Supergirl being Superman's cousin, which causes Reactron to starts targeting Supergirl. He is eventually defeated by Supergirl and arrested.
"Falling" is the sixteenth episode in the first season of the CBS television series "Supergirl", which aired on March 14, 2016. The episode was written by Robert Rovner & Jessica Queller, and directed by Larry Teng.
Robert Rovner is an American television producer and writer, best known for his work on TV shows Crossing Jordan, Private Practice, Dallas (2012 TV series), Bionic Woman, Summerland, American Dreams (NBC) and Supergirl (TV series). He is currently Co-Showrunner/Executive Producer on Supergirl alongside Jessica Queller. He served as showrunner/executive producer and writer of "Grey's Anatomy's" 2007 spin-off series, "Private Practice" as well as the final season of Crossing Jordan. He was also an executive producer and writer on "Dallas" (TNT).
A guidebook for the series, to be published by Abrams, is currently scheduled to be released in March of 2019. Supergirl: The Secret Files of Kara Danvers will feature "detailed profiles on characters and super powers, a heroes and villains gallery, episode guide, and more" from the first three seasons of the series.[110]
In May 2016, it was announced that "Supergirl" would move from CBS to The CW for its second season, as well as moving production from Los Angeles to Vancouver, where the CW Arrowverse series film. The second season premiered on October 10, 2016. It was also announced that Supergirl would appear on "Arrow", "The Flash", and "Legends of Tomorrow" during the 2016–17 season crossover episodes, though Guggenheim cautioned that "She is going to be coming over but we're not going to do a full on "Supergirl" crossover". Kreisberg also confirmed that, despite the series moving to The CW, the title character's universe would not be integrated into the Arrowverse. The Earth the series inhabits is Earth-38 in the Arrowverse multiverse, and has been informally referred to as "Earth-CBS" by Guggenheim, named for the network where "Supergirl" first aired.
The first program to air was the entire first season of "Supergirl".
"Supergirl" is an American television series developed by Greg Berlanti, Ali Adler, and Andrew Kreisberg based on the characters created by Jerry Siegel and Joe Shuster in the "Superman" franchise and Al Plastino and Otto Binder's character Supergirl. The series stars Melissa Benoist in the titular role of Kara Zor-El / Kara Danvers / Supergirl, as well as Mehcad Brooks, Chyler Leigh, Jeremy Jordan, David Harewood, and Calista Flockhart, with Chris Wood, Floriana Lima, Katie McGrath, Odette Annable, Jesse Rath, Sam Witwer, Nicole Maines and April Parker Jones joining in later seasons. In addition to original characters, several other characters from DC Comics universe also appear throughout the series. For its first season, "Supergirl" aired on CBS, before moving to The CW for its second season.
During her career, Slater has revisited her 1984 role of Supergirl. She made a brief guest appearance on "Seinfeld" as a love interest of Jerry Seinfeld, who in reality is a huge fan of Superman. Slater was seen in a recurring role as Clark Kent's biological mother, Lara, on the TV series "Smallville" and as Supergirl's adoptive mother in the TV series "Supergirl".
DC series include "Shazam!", "The Secrets of Isis", "The Flash (1990 TV series)", "Swamp Thing", "Birds of Prey", "Gotham", "Legends of the Superheroes", "Human Target (1992 TV series)", "Human Target (2010 TV series)" and "Powerless". Arrowverse series include "Arrow", "The Flash (2014 TV series)", "Supergirl", "Legends of Tomorrow", "Constantine" and "Black Lightning". Vertigo-based series include "iZombie", "Lucifer" and "Preacher". DC Universe airs the series "Titans", and will air the upcoming "Doom Patrol".