

S03E13
Both Sides Now
Aired February 5, 2018
Free, with no ads. Tick off what you watch and see what airs next.
Summary
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.
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