The Martian Chronicles

"The Martian Chronicles" is the upcoming tenth episode of the second season of Supergirl, and the thirtieth-first episode overall. It will air on February 6, 2017.

Synopsis
Armek, a White Martian descends on National City intent on taking M’gann back to Mars to face her punishment as a traitor. Hank and Supergirl determine the best way to keep M’gann safe is to bring her to the D.E.O.. However, when it is revealed that Armek shape-shifted into M’gann and is now loose in the building, the team realize he could be disguised as any one of them.

Trivia
'TBA