Both Sides Now Supergirl : Season 3 Episode 13
TV-PG The CW 43m int(0)
Aired: February 5th, 2018 @ 9:00 PM EST on The CW
The DEO captures a second Worldkiller, Purity. Supergirl and Alex use very different methods of interrogation with Purity in the hopes of finding out how to defeat Reign. However, Purity escapes and attacks the city’s subway tunnels. Meanwhile, J’onn, Winn and Mon-El band together to fix the Legion ship.