Complete story — includes the ending
The CIA intercepts a communication suggesting that a terrorist organization, Shining Sword, has a plasma charge weapon. Sydney and Vaughn access a secure data facility to download information but their access is cut short by a Covenant operative who escapes after a car chase. They trace the weapon to a ship but Vaughn is shot while on board. The story is then replayed, with additional scenes showing Lauren's involvement in the operation. She had leaked information, it was her in the secure data facility and it was she and Sark that had escaped in the car. Lauren is aroused by the operation and makes love with Sark. Back aboard the ship, Sark and Lauren attempt to stop Sydney and Vaughn. Vaughn gets the upper hand, demanding that Lauren remove her mask but before Lauren reveals her identity, Sark threatens to kill Sydney. Sark and Lauren escape, arming the weapon which Vaughn disables with Marshall's remote assistance. Sloane meets Dr. Barnett, revealing that he had an affair with Irina Derevko and that Sydney may be his daughter.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Alias season 3. HTML formatting and reference markers removed. · Content license