Alias (2001)

S3E7 Prelude

Jack goes to extreme lengths to keep the NSC from uncovering the truth behind Sydney's killing of a Russian diplomat. However, his efforts put a significant strain on Vaughn's marriage, as Lauren edges closer to unraveling the mystery surrounding Sydney. At the same time, Sydney decides to team up with Sloane for a mission aimed at stopping a scheme to acquire the operating system for a lethal weapon. During this mission, she unexpectedly finds an ally in her quest to locate someone who has been missing for two years.