Here's a preview of Sunday's new episode of Supergirl titled, "Fallout."
A shocking revelation causes chaos in National City. Supergirl sets out to capture Mercy Graves, while Alex takes control at the DEO. Back at CatCo, Kara decides to write an investigative story n Mercy and asks Lena if she can interview her as Mercy has ties to the Luthors. Meanwhile, Brainy meets Nia and the two end up in a precarious situation.
You can catch Supergirl Sundays at 8/7c on The CW.