Kara’s two identities are stretched thin when Supergirl must protect National City from a series of bombings and Kara is tasked with babysitting Cat’s son, Carter. Also, James is conflicted…

Supergirl’s powers are tested when Reactron, one of Superman’s formidable enemies, arrives in National City and targets the young hero. Also, Cat plans to run an exposé on Supergirl.

When Kara’s attempts to help National City don’t go according to plan, she must put aside the doubts that she — and the city’s media — has about her abilities…