In the latest episode of The Flash, however, viewers got a crossover that nobody could have seen coming.
Aliens” event brought protagonists from four shows together for the first time, and the upcoming musical extravaganza between The Flash and Supergirl has been getting buzz for months.
As Cisco was traveling between Earths in a battle with Gypsy, their brawl popped out into Earth-38 in a place that Supergirl fans recognized immediately: CatCo.
The CW’s DC universe has already featured some epic superhero team-ups in the 2016-2017 TV season.