TNT has renewed Falling Skies, cable's #1 new series, for a second season. The epic saga about the aftermath of an all-out invasion by an alien military force has been a tremendous hit both domestically and internationally. Falling Skies, which airs Sundays at 10 p.m. (ET/PT), stars Noah Wyle and comes to TNT from DreamWorks Television and executive producer Steven Spielberg. TNT has ordered 10 episodes for the second season, which is slated to air in summer 2012.