EPISODE 17 – The Frame
Vaughn decides he must separate from Lauren, but his wife isn't about to give up without a fight of her own, taking shocking measures to ensure Vaughn stands by her side. Sloane's only hope at exoneration gets crushed when Jack discovers the truth about the affair with Irina.

EPISODE 18 – Unveiled
As Lauren tries to prove her worth to The Covenant, Sydney airs her suspicions about Lauren to Vaughn. At first, Vaughn refuses to listen, but his nagging doubts begin to grow – as Kazari Bomani orders Sark to kill Lauren himself.

EPISODE 19 – Hourglass
Sydney receives the shock of her life when she learns the identity of "The Passenger." Now it's a race against time as Sydney struggles to find the Rambaldi devices that will help locate The Passenger. And the only one who can help her is Arvin Sloane, only seventy-two hours away from execution.

EPISODE 20 – Blood Ties
Sydney and Jack seek the aid of Sloane to track down The Passenger (Nadia). Meanwhile, after learning a secret about his father, Vaughn is kidnapped and tortured by Lauren and Sark, who are hot on the trail of "The Passenger" themselves.