 In this episode, the entire world of  ALIAS  is turned upside down, beginning with the mysterious disappearance of Sloane that brings Anthony Geiger, the new head of SD-6 into Jack and Sydney s life. As the Bristows struggle to stay one step ahead of having their secret blown wide open by Geiger, Will and Francie make a startling discovery of their own as she prepares to open her new restaurant. After an airborne mission to recover something called a Server 47 dive, Sydney uncovers a crucial weakness, one that could bring down the entire Alliance. But to put her plan into action, she must tell Dixon the truth about everything when Jack is captured, and Dixon has to make the decision to reveal the security code... enabling the CIA to launch a world-wide offensive against all SD cells to bring down the Alliance for good.