When a network premieres a television pilot at South by Southwest rather than on their channel, they’re banking on it being a show that can build buzz fast. Now that Mr. Robot has reached its final episode, airing on USA on 9/2 at 10 p.m., it’s fair to say the gambit paid off. Mr. Robot had the second-highest scripted series premiere on basic cable this year, and the ratings have averaged a solid 3 million viewers a week.