‘The Flash’/’Supergirl’ Crossover — Everything You Need To Know Before The Epic DC Comics Event

Over the past few years, the DC universe has created a multi-network family of TV shows, and it occasionally has crossover’s between two of the same network’s shows. Take, for example, when The Flash has appeared in Starling City to help Team Arrow (both shows are on The CW). And while other crossovers have been limited to characters belonging to The CW, hopping back and forth between the three comic book shows, that is all about to change.

Barry Allen aka the Flash is zooming over to CBS’ Supergirl to team up with Kara Danvers. It’s the first time we have seen it done, and although the crossover was predicted at some point, nobody thought it would be happening so soon. But producer Andrew Kreisberg knows why that is.

“We’re generally not fans of waiting to do anything,” Kreisberg admitted to Variety. “We had our first big crossover on Flash in Episode 4 when we had Felicity [Arrow star Emily Bett Rickards] over, so I think it just felt like Supergirl had its seas legs under it at this point in the year and it didn’t feel like a gimmick as much as ‘this could be really good.”

While Arrow and The Flash have had crossovers, the crossover between Supergirl and The Flash is different. Cinema Blend stated that since The Flash was a spinoff of Arrow and shared the same audience, crossover events were always going to happen.

CBS Promo Shot of Melissa Benoist as Supergirl

But the same audience that watched Supergirl might not be as familiar with The Flash as people hope. However, Entertainment Weekly reports that Supergirl and The Flash are out of Warner Bros., which, along with CBS, own The CW, making the network jump slightly less complicated.

“Everybody was on board, because everybody knows that these things are special,” Kreisberg said.

The hardest part was waiting for the right time to do the crossover since none of the other shows on The CW mention Supergirl or Metropolis. That’s why the recent season of The Flash has spent a lot of time establishing the fact that parallel universe’s do exist.

“If Supergirl and Flash were existing in the same universe, then why has no one on Flash or Arrow ever talked about Metropolis or the fact that there’s a Superman?” Kreisberg pointed out. “The one explanation for that is because he doesn’t exist in that world.”

So how will the crossover go down? For the unfamiliar, Barry Allen has been training hard to increase his already supersonic speed in order to fight the supervillain Zoom. Barry uses a tachyon device that allows him to run so fast that he accidentally ends up in a parallel universe. This scenario makes a lot more sense than to have Arrow, who technically isn’t a superhero, at least not like Flash or Supergirl, somehow met up with Supergirl.

Season 2 episodic still of The Flash

But as Barry Allen races his way into the world of Supergirl, he learns something: he has never heard of this Supergirl, and Supergirl and never heard of the Flash. So the pair question who the other is right away, which adds an element of comedy instantly to the episode.

“Barry and Kara take a little bit of a leave of their problems for a week to engage in the kind of hilarious high-stakes high jinx that ensue when two super­heroes wind up in the same universe,” Kreisberg said.

And, of course, it can’t be a Supergirl meets the Flash episode without a foot race! According to MTV News, somewhere between saving the city from Live Wire and Silver Banshee, who team up to kidnap Cat Grant, the duo finally see who the fastest person on Earth really is.

To see who wins the race, make sure to watch the crossover event on March 28 at 8 p.m. ET on CBS.

Tell us! Will you be tuning in when the Flash meets Supergirl? Let us know in the comments, and check out a preview below.

[Image via CBS]