The cable outlet dropped a bomb this morning (figuratively speaking). The key art for WGN America‘s second original scripted series is out, and it looms large. Manhattan is about a New Mexico town whose very existence is classified. That’s because its residents make up the world’s highest concentration of geniuses — who are there to work on the ultrasecret Manhattan Project. Their families live with them but are clueless about the fact that these scientists are building the world’s first atomic bomb. Starring John Benjamin Hickey, Olivia Williams, Daniel Stern, Ashley Zukerman, Rachel Brosnahan, Katja Herbers, Alexia Fast, Christopher Denham, Harry Lloyd and Michael Chernus, the 1940s-set drama premieres July 27.