Terrell Tilford
“Switched at Birth” alum Terrell Tilford was cast as a White Martian named Armek in Season 2 of “Supergirl.” Pictured: Tilford attends the ‘R&B Divas LA’ premiere event at The London on July 9, 2013 in West Hollywood, California. Getty Images/Angela Weiss

Fans are going to meet another White Martian in Season 2, episode 11 of “Supergirl.”

The synopsis for the episode, titled “The Martian Chronicles,” reveals that a White Martian named Armek appears in National City to take M’gann (Sharon Leal) back to their home planet to face her punishment as a traitor. To keep M’gann safe, Kara (Melissa Benoist) and J’onn (David Harewood) bring her to the DEO. Things, however, get tricky when they find out that Armek shape-shifted into M’gann. With the DEO’s security compromised, the team realizes that Armek could be disguised as any of them.

Armek will be played by Terrell Tilford, who most recently appeared as Eric Bishop in Season 4 of Freeform’s family drama “Switched at Birth.” Tilford is best known for his roles as David Grant on CBS’ “Guiding Light,” Greg Evans on ABC’s “One Life to Live” and Ramon Rush on Lifetime’s “The Protector,” among many others.

In the comics, Armek is a member of the alien superteam known as the Hyperclan. Armek and seven other aliens come to Earth, claiming that they are the last survivors of a world that had been destroyed by environmental irresponsibility. Vowing to never allow such a disaster to happen again, the Hyperclan claims they journeyed through space looking out for planets that are in need of saving. This, however, is just a front to turn public opinion against Earth’s more prominent superheroes, particularly the Justice League of America.

When M’gann met J’onn on “Supergirl” for the first time, she told him that she escaped Mars after she was freed by a good-willed female White Martian. Later, however, M’gann admitted to J’onn that she was actually the White Martian who allowed some Green Martians to escape during the conflict between the two Martian races.

“Supergirl” Season 2, episode 11 airs on Monday, Feb. 6 at 8 p.m. EST on The CW. The episode is directed by David McWhirter from a script written by Gabriel Llanas and Anna Musky-Goldwyn.