This week, Green Lanterns #20 hits store shelves. The second part to “The Green Impurity” arc, this issue sees Green Lanterns Jessica and Simon trapped 600 feet below the sea by Dr. Polaris. What does he want? Who is he after? Find out in the Comics Beat’s exclusive preview after the jump.

Writer: Sam Humphries Pencils: Eduardo Panscia Inks: Julio Ferreira Colors: Blond Letters: Dave Sharpe “THE GREEN IMPURITY” part two! Following the events of JUSTICE LEAGUE VS. SUICIDE SQUAD, Polaris strikes! The two Earth Green Lanterns are caught between the two warring personalities of the Master of Magnetism.