WARNING: SPOILERS/NSFW - DC on SCREEN #094 - Supergirl 1x11 - Strange Visitor From Another Planet Review | An anti-alien senator is visiting National City just in time for a white martian to attacK! But who are the white martians, and why do they cause Hank Henshaw such grief?  For the first time in live action, we have seen the horrific eradication of the green martians!  Is there an on-the-nose illegal immigration message throughout this episode? You bet! But as heavy handed as that is, Harewood's Henshaw gives us the chills when he tells us that he will hear his family's screams until the day he dies.  If your qualm with Supergirl thus far has been that the show was less than harrowing, this may be the episode for you!