The moment we knew for certain that Supergirl would meet The Flash, rays of sunshine burst forth from the combination of TV’s lightest heroes at a time we sorely need that. Now, everyone literally gets ice cream in quick clips from the “Worlds Finest” crossover, nestled in a new behind-the-scenes featurette.

DC went behind the scenes with series star Melissa Benoist and guest star Grant Gustin, both barely containing their joy at sharing a screen with one another. A few quick clips within the featurette have Barry demonstrating his powers by getting everyone ice cream, and playfully uncertain if their two Earths share the same pop culture references.

And for brevity’s sake:

So reads the official March 28 synopsis, which explains the villainous teamup we glimpsed on set earlier:

Kara gains a new ally when the lightning-fast superhero The Flash 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.

We’ll find out more on the road to March 28, so stay tuned for more “Worlds Finest” details of the big Supergirl-Flash crossover!

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