Supergirl: Both Sides Now
The DEO captures another Worldkiller, who escapes and attacks the city's subway tunnels.
Jesse Warn Jerry Siegel, Joe Shuster, Greg Berlanti, Ali Adler, Andrew Kreisberg, Jessica Queller, Paula Yoo, Derek Simon, Anna Musky-Goldwyn, Eric Carrasco, Otto Binder, Al Plastino
