the flash first appeared on arrow in the second season.
the flash first appeared on arrow in the second season.
when did the flash first appear on arrow?
second season
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
on july 30, 2013, it was announced that "arrow" co-creators greg berlanti and andrew kreisberg, "arrow" pilot director david nutter, and dc comics cco geoff johns would develop a television series based on the flash for the cw, and it would detail barry allen's origin. kreisberg revealed after the announcement that allen would first appear as a recurring character on "arrow" in three episodes of season two—all written by berlanti, kreisberg and johns—and the last of the episodes would act as a backdoor pilot for the new show. kreisberg added that allen would be a forensic scientist and the introduction of his superpowers, as well as the reactions to this, will be very human and grounded. johns stated that the character of the flash in the show would resemble his comic book counterpart, complete with his trademark red costume, and not be a poor imitation. kreisberg elaborated: "no sweat suits or strange code names; he "will be" the flash." while researching the best way to depict the flash's lightning speed, johns stated it would not just be the standard "blurring around".
the flash (season 1)