Mars Attacks Supergirl! This Is Bad News for J'onn J'onzz

The White Martians are invading Supergirl on Monday, and it will bring up a lot of bad memories for J'onn J'onzz (David Harewood). The episode will reveal that the White Martians oversaw a genocide of J'onn's people: the Green Martians. Confronting his past will only put more pressure on J'onn's

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Source TVGuide.com: Breaking News http://ift.tt/1KyCS0I