Alias

A fireball drops from the sky, devastating Moscow's Gorky Park. In the ensuing investigation - for the first time in two years - Sydney and Vaughn are reunited as a team to prevent Sark from destroying the nation's satellite communications system. Meanwhile, Jack must find a way to stop Marshall from uncovering the identity of a murderer, and a suspicious Sydney accompanies Vaughn and Lauren as they meet with Sloane to ask for a favor.