Action Comics #1102

LOST IN KRYPTON'S PAST! Young Clark Kent is trapped in Krypton's past, forced to witness a world he never knew for the first time. His only hope of getting home is to break Supergirl out of Zod's prison! But the present day is not safe either! Can Steel find a cure for the spread of the K-Zone before all of Earth is covered in Kryptonite?!