Alias - Season 2eps22 -

In the Alias Season 2 finale, "" (Episode 22), the phrase "useful piece" refers to a critical component of a Rambaldi artifact .

The episode centers on a desperate race between the CIA and Arvin Sloane to assemble the final machine of Milo Rambaldi . Key events include: Alias - Season 2Eps22

: Sydney discovers that her best friend Francie has been murdered and replaced by a genetic double, Allison Doren . In the Alias Season 2 finale, "" (Episode

: After a brutal fight with Allison, Sydney collapses and wakes up in Hong Kong . She is stunned to learn from Vaughn that she has been missing for two years and that he is now married . Alias: “Second Double”/“The Telling” - AV Club : After a brutal fight with Allison, Sydney

: Sloane manages to activate a device known as "The Telling" after collecting enough artifacts to complete the assembly .