18) "Falling Skies" (2011-2014)This TNT drama received early praise for being a better-than-average summer TV show (and, more likely, for employing a likable lead in Noah Wyle and sporting Spielberg's name on much of its marketing materials). Looking back, it's neither above-average television -- at best, it's C-grade sci-fi -- nor is it better than many shows dominating the summer months today.