Roulette and Miss Martian Come to Supergirl in “Survivors” Synopsis

By Russ Burlingame Roulette comes to National City, bringing her superhuman fight club with her, while J'Onn J'Onzz struggles to get to know Miss Martian, in the official synopsis for "Survivors," the fourth episode of Supergirl's second season.The CW released the official synopsis tonight, giving fans an idea of what to expect when more