SEASON PREMIERE: Last year, this USA Network drama came out of nowhere, with little promotion or advance warning last summer, to become one of the more intriguing new shows of 2015. This year, for Season 2, the central secret is out: The identity of the mysterious central character is now known, and the show’s protagonist, Elliot (Rami Malek), has to deal with the consequences of that revelation. And, as well, with the consequences of the computer hack that severely disrupted the E Corp business the mysterious Mr. Robot was targeting.