The CW’s Supergirl season three episode 12 ended with Supergirl recognizing another Worldkiller, setting up episode 13 which finds Purity (guest star Krys Marshall) locked up by the DEO. Directed by Jesse Warn from a script by Jessica Queller and Paula Yoo, season three episode 13 is titled “Both Sides Now.” Season three episode 13 will air on February 5, 2018 at 8pm ET/PT.
The season three cast includes Melissa Benoist as Kara Danvers/Supergirl, Chyler Leigh as Alex Danvers, David Harewood as J’onn J’onzz, Jeremy Jordan as Winn Schott, Mehcad Brooks as James Olsen, Katie McGrath as Lena Luthor, Chris Wood as Mon-El of Daxam, and Odette Annable as Reign. The series is executive produced by Greg Berlanti, Sarah Schechter, Robert Rovner, and Jessica Queller.
The “Both Sides Now” Plot: THE DEO CAPTURES ANOTHER WORLDKILLER – The DEO captures a second Worldkiller, Purity (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 (Chris Wood) band together to fix the Legion ship.