when does the flash first appear on arrow
Flash vs. Arrow The first indication of potential crossover events in the Arrowverse occurred on The CW during the 2013–14 television season, when Barry Allen was introduced in the eighth episode of Arrow's second season ahead of the debut of The Flash.[8] In July 2014, it was announced that the eighth episodes of the third season of Arrow and the first season of The Flash would be a two-hour crossover event.[9] The crossover was originally planned as the seventh episodes of each series, but was pushed back due to the large amount of work needed to accomplish it.[10] In particular, the schedule coordination of trying to "jam another episode into the 23-episode schedule for each of [the] shows."[11] Marc Guggenheim, creator and executive producer on Arrow, explained that there was "no financially responsible" way of executing the crossover, with budgets being blown, long hours and the actors having to film scenes from both series on the same day.[11]
The Flash (season 4) The fourth season is set to begin airing on October 10, 2017, on The CW.
Is It Fall Yet? The film chronicles the characters' summer break between seasons four and five.
The Flash (2014 TV series) The Flash is an American television series developed by Greg Berlanti, Andrew Kreisberg, and Geoff Johns, airing on The CW. It is based on the DC Comics character Barry Allen / Flash, a costumed superhero crime-fighter with the power to move at superhuman speeds. It is a spin-off from Arrow, existing in the same fictional universe. The series follows Allen, portrayed by Grant Gustin, a crime scene investigator who gains super-human speed, which he uses to fight criminals, including others who have also gained superhuman abilities.