What happened to Irina? Is she really dead?
Early in season four, we learned that Jack killed Irina because she had hired an assassin to kill Sydney. Irina’s death prevented the hit on Sydney from being carried out. However, later developments revealed that Irina did not hire the assassin – she was framed by her cruel sister, Elena. The person Jack shot was a genetic double of Irina. While everyone believed Irina was dead, Elena tortured Irina into helping her build a Rambabli device. After learning that Irina was alive, Jack, Syd and Nadia rescued her. She helped them stop Elena, and then Jack let Irina go.
