In less than 2 weeks, National City will be visited by another superhero. No, it won’t be “him,” as Supergirl (Melissa Benoist) and her crew say when speaking of Superman, but The Flash himself, Barry Allen (Grant Gustin). In anticipation of this crossover event, even more exciting because of the crossing over of channels, a 10-second teaser has been released.

Check out the teaser and synopsis below.

There’s not much to it. You don’t even see the two heroes together. But “the streak” is outlining the symbol, and the synopsis reveals that National City does exist in an alternate universe than Earth-1 Central City. We kinda already knew that based on the fact that nobody on Arrow and The Flash ever mentioned two flying superheroes, plus we saw Supergirl flying when Cisco, Barry, and Harry (Carlos Valdes, Gustin, and Tom Cavanagh) traveled through the breach. It is nice to read the confirmation though. When we last saw Barry, all the breaches were closed and he had no hope of helping the Earth-2 people. I guess he figured out how. Unless maybe National City is in Earth-3? Earth-75?

The Flash/Supergirl crossover episode airs Monday, March 28th at 8:00pm ET on CBS.

Supergirl airs Monday nights at 8:00pm ET on CBS.

The Flash airs Tuesday nights at 8:00pm ET on The CW.

CBS’s synopsis:

“Worlds Finest” – Kara gains a new ally when the lightning-fast superhero The Flash (Grant Gustin) suddenly appears from an alternate universe and helps Kara battle Siobhan, aka Silver Banshee, and Livewire in exchange for her help in finding a way to return him home, on SUPERGIRL, Monday, March 28 (8:00-9:00 PM) on the CBS Television Network. Grant Gustin crosses over as The Flash.

Video

Supergirl – Official Flash Crossover Promo

On March 28th, Supergirl comes face to face with the Worlds Fastest Man when Grant Gustin guest stars as the Flash in an unprecedented superhero event only on CBS!