Complete story — includes the ending
Elena Derevko raids the DSR facility holding all the CIA's Rambaldi devices. The CIA traces the conspiracy back to Nadia's laptop and the bugged necklace Sophia Vargas (who was Elena Derevko all along) gave her. In a flashback Arvin Sloane and Nadia Santos visit the one man who knows how to assemble the Rambaldi device. The man is subsequently killed by Elena. When Sloane and Sydney arrive at the man's trailer they find him murdered. Sloane then betrays the CIA by knocking Sydney out and fleeing with the knowledge of Elena's location. Since Sloane is the only living expert on Rambaldi, they join forces. To find Elena and Sloane, Jack Bristow visits Katya Derevko and promises her immunity for information on Elena's whereabouts which she then gives to Jack. Dixon, Nadia, and Sydney then infiltrate Elena's compound, where Dixon is shot by Elena, but not before positively identifying that Irina Derevko, long thought to be executed by Jack, is still alive.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Alias season 4. HTML formatting and reference markers removed. · Content license