The relatively long wait for the third season of Silo is nearly over. Apple TV just announced the dystopian sci-fi hit returns on July 3 , with episodes airing each Friday until September 4. We have long championed this show , calling it "another gem" for the platform. The streamer has dropped a short teaser for the upcoming season and it confirms rumors of an increased focus on the "before times" via a storyline that was introduced in the finale of season two. The trailer depicts scenes from both time periods, as protagonist Juliette, played by Rebecca Ferguson, speaks in voiceover. "Before we can know why we’re here. Before we can know everything is as it is. Before we know how it all will end, we need to understand how it all began,” she says, alluding to the creation of the various bunkers littered throughout the post-apocalyptic wasteland. For the uninitiated, Silo is an adaptation of Hugh Howey's Wool series of books.…