It’s been a big year for comic adaptations on television, despite it barely being April yet. The Walking Dead has continued to be one of the most philosophically astute series currently on television, and the second season of Daredevil is inarguably the best adaptation to come out of the Marvel Universe thus far, and thats counting the first Avengers film, Iron Man, and both Captain America movies. And the anticipation that has built up for Luke Cage, set to debut on Netflix later this year, hit a fever pitch with the Nas-soundtracked teaser that came along with Daredevil Season 2.

This is, of course, ignoring the less dark series that have been building up momentum on CBS and the CW, specifically the second season of The Flash and the unsteady but largely amiable Supergirl series. The Flash has been having a lot of fun with its incredibly convoluted universe, and Supergirl has been similarly making great hash out of the DC universe, most notably in its introduction of Martian Manhunter earlier this season. This coming Monday, March 28th, the world’s of these two heroes with meet in “World’s Finest,” in a big crossover event, and the first trailer for the first episode was just released. The crossover will see The Flash (Grant Gustin) helping Supergirl (Melissa Benoist) get rid of two supervillains in exchange for helping him with getting back home. The trailer for the episode, which will air at 8 p.m. EST on CBS, can be found right below.

Here’s the official full trailer for Supergirl-The Flash crossover episode:

Here’s the official synopsis of the crossover episode, “World’s Finest”:

    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.

Via Collider