(Photo: BBC America) Warning: This recap for the “The Mitigation of Competition” episode of Orphan Black contains spoilers. Three episodes ago, the Evie Cho-led evil Empire struck back against with lethal force against the Clone Club and devout Neolutionist Susan Duncan. Tonight, on Season 4’s penultimate episode, “The Mitigation of Competition,” that tentative Rebel Alliance returned fire, blowing up Darth Cho’s plans to take Bright Born public in the same way that Lando and Nien Nunb made the second Death Star go kablooey. Actually, Rachel was the one to take down Evie, appearing to betray her clone sisters by striking a deal with their nemesis.