Grant Gustin is on his way to the set of Supergirl to film the episode “Worlds Finest,” which sees his character, Barry Allen/The Flash head to National City for a special crossover. The actor posted on instagram Tuesday night that he was heading to the other DC Comics show’s set.
A photo posted by Grant Gustin (@grantgust) on
The crossover was teased on this week’s episode of The Flash in a surprise cameo by Melissa Benoist, the star of Supergirl. When Barry Allen, Cisco, and Harrison Wells went through the portal to Earth-2, they first passed other alternate worlds. In those, they saw Benoist as Kara Zor-El flying along as one of the visions, seemingly confirming that the alternate reality conceit would be used to connect the shows.
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The Supergirl episode guest starring The Flash, “Worlds Finest” will air March 28, 2016 at 8pm on CBS.