Deadly things are about to go down on Supergirl Season 4 Episode 15, titled "O Brother, Where Art Thou?"
Picking up immediately where Supergirl Season 4 Episode 14 ended, Supergirl is ready to get revenge for James being shot.
Then there's Lex Luthor who makes a triumphant return, but he's got a horrifying plan in place.
Have a look at the photos below.
Remember you can watch Supergirl online right here via TV Fanatic.
Supergirl airs Sundays at 8/7c.