The White Martians are coming! I repeat: The White Martians are coming!

Well, at least one of them is coming to National City in this extended new promo for the next episode of Supergirl.

Titled "The Martian Chronicles," next week's episode will find Supergirl, J'onn J'onzz and the rest of the DEO gang sheltering M'gann from a White Martian named Armek (Terrell Tilford), who's fully intent on taking Miss Martian (who suffered a psychic attack that nearly ended her life in this week's episode) back to Mars to pay for her crimes.

A DC Comics character, Armek first appeared in the pages of JLA #1 in the late '90s and was a member of an alien superteam named Hyperclan, but I digress ...

From what can be seen in the promo below, Armek's going to meet resistance from Team Supergirl, but he's got a trick up his sleeve (besides being a super-strong White Martian, that is): First shape-shifting as M'gann, he'll be running around the locked-down building disguised as one (or more!) of our super friends. Check out the episode synopsis:

"Armek (guest star Terrell Tilford), a White Martian, descends on National City intent on taking M'gann (guest star Sharon Leal) back to Mars to face her punishment as a traitor. Hank (David Harewood) and Supergirl (Melissa Benoist) 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 realizes he could be disguised as any one of them."

Supergirl's "The Martian Chronicles" will air on Feb. 6 on The CW.

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(via Coming Soon)