Supergirl - The Martian Chronicles

Seizoen: 2 - Aflevering: 11 / 31 - Eerst uitgezonden: 06 februari 2017 - Episode ID: 1398553

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 DEO. 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.