The CW has released the synopsis for episode #313 of Supergirl, which you can check out below. The installment, titled “Both Sides Now,” is officially described as follows:
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THE DEO CAPTURES ANOTHER WORLDKILLER – The DEO captures a second Worldkiller, Purity (guest star Krys Marshall). Supergirl (Melissa Benoist) and Alex (Chyler Leigh) use very different methods of interrogation with Purity in the hopes of finding out how to defeat Reign (Odette Annable). However, Purity escapes and attacks the city’s subway tunnels. Meanwhile, J’onn (David Harewood), Winn (Jeremy Jordan) and Mon-El (Christopher Wood) band together to fix the Legion ship.
Supergirl, “Both Sides Now,” was directed by Jesse Warn and written by Jessica Queller & Paula Yoo. The episode airs Monday, February 5, at 8pm on The CW.
