in the episode of supergirl called  worlds finest '', she met the flash.
what episode of supergirl does she meet the flash?
`` worlds finest ''
in january 2016, tassler's successor glenn geller said "i have to be really careful what i say here" in regards to a potential "supergirl"/arrowverse crossover, so "watch and wait and see what happens." the following month, it was announced that gustin would appear on the "supergirl" episode "worlds finest". berlanti and kreisberg, also "supergirl" executive producers, thanked "the fans and journalists who have kept asking for this to happen. it is our pleasure and hope to create an episode worthy of everyone's enthusiasm and support." in "worlds finest", "supergirl" is established as being in an alternate universe where the flash helps kara fight the silver banshee and livewire in exchange for her help in returning home. the events of the episode intersect with the events of the eighteenth episode of "the flash" season two, "versus zoom". the crossover required "a lot more logistical trickery" than the usual arrowverse crossovers, due to gustin filming "the flash" in vancouver alongside "arrow" and "legends of tomorrow", while "supergirl" was produced in los angeles. the producers chose to use the flash as the character to crossover, due to his ability to travel between various earths, and because it was "a little more fun at first to bring the veteran from that show to the chemistry of a new show." berlanti stated that "in a perfect world", the crossover would have featured both gustin and amell's green arrow, "but logistically that would have been a nightmare to try and do both shows. we had to facilitate one." gustin was optimistic that the crossover in 2016 would allow another crossover the following year with the rest of the arrowverse shows. in may, it was announced that "supergirl" would move from cbs to the cw for its second season, and that production would move 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 earth-1, the main universe of "arrow", "the flash" and "legends of tomorrow", and would continue to exist in a parallel universe. the earth the "supergirl" 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. in august, the cw announced the animated web-series "" for cw seed, intending that the actor cast as raymond "ray" terrill would appear in the live-action series, much like mari mccabe / vixen.
arrowverse
bullet::::- livewire appears in "supergirl" portrayed by brit morgan. in this version, leslie is a confident, abrasive and funny shock-jock who works for catco and becomes as dangerous and shocking as her words following an accident in which supergirl rescues her from a potential helicopter crash during a lightning storm. the rescue backfires when supergirl gets struck by lightning while pulling leslie out of the helicopter—giving both an electric shock and leslie electrical powers. supergirl finally defeats her by dousing her with water from an underground water pipe, shorting her out. she is then imprisoned at the deo--the first transhuman (later coined as metahuman) to be incarcerated there, since this world does not yet have the means to counter them. she made a second appearance in "the flash/supergirl" crossover as one of the main villains alongside another former catco employee, silver banshee (siobhan smythe). in it, silver banshee breaks livewire out of the deo so they can go after cat grant, supergirl and kara danvers (not realizing kara and supergirl are one and the same person). the flash and supergirl defeat the two with the help of the public when firemen hose down leslie. instead of returning to the deo, both livewire and the silver banshee are imprisoned by the national city's new specialized prison cells for metahuman criminals after the flash helps providing means to combat them. she returned in season 2 episode "we can be heroes". in the episode, livewire is kidnapped from prison by scientist dr. hampton, who wants to steal her power to create a line of electricity-based metahuman super soldiers, of which three were created, with her abduction being framed in a manner that resembled a break-out. at the end of the episode, livewire escapes with supergirl's help, and they declare a temporary truce. in season 3 episode "fort rozz", livewire agrees to help supergirl along with psi on a mission to fort rozz to get intelligence on reign. livewire and reign fight but she dies, saving supergirl.
livewire (dc comics)