Alias - Season 4 Episode 10 -

Dixon secretly enlists Sydney to help him prove that Sloane is double-crossing the CIA and using APO to steel the Blackwell Index, a master blackmail list, and to reconstruct the Alliance of Twelve. Sydney makes her way into Sloane's house so as to copy the encryption key from his secure phone and crack his phone calls. When Nadia finds Sydney snooping around Sloan's computer, she doesn't tell him, but becomes disappointed in her sister and begins to lose trust with Sydney. Meanwhile, Vaughn discovers something disturbing about his late father when he visits his ...