WGN America is quickly ramping up its original portfolio. The cable network has greenlighted its second scripted series, 13-episode drama Manhattan, for a summer 2014 premiere. The show, from writer Sam Shaw and director Thomas Schlamme, is being produced by Skydance Television, Tribune Studios and Lionsgate Television. Its pickup comes two months after WGN ordered its first original drama series, Salem, and four months after the network signaled its plans to become a player in the space with the hire of Matt Cherniss as president. Created by Shaw (Masters of Sex) and to be directed by The West Wing alum Schlamme, Manhattan is set against the backdrop of the clandestine mission to build the world’s first atomic bomb in Los Alamos, New Mexico and follows the brilliant but flawed scientists and their families as they attempt to co-exist in a world where secrets and lies infiltrate every aspect of their lives.