We’ve known for a while that there would be crossovers between The Flash and Arrow, and they sort of already have with Barry Allen showing up in Season 2 of Arrow, but now there’s confirmation of exactly when the big crossover will happen.
According to TV Guide, the 8th episode of both shows will be part of a big crossover event:
“Episodes 8 of both shows, Arrow and Flash, are going to be a two-hour crossover event,” Kreisberg says. “[Also], in Episode 4, Felicity [Emily Bett Rickards] is going to come to The Flash.”
Even bigger news? The producers said that between the two shows they’ll have half of the Justice League on television this season…