For Sloane, it's the ghost of his late wife that has him on edge. Rattled by a rash of eerie events---and the guilt of having poisoned Emily himself---the SD-6 head sends Dixon off to investigate. But Sloane may not want to know what Dixon learns, particularly about a recent visitor to Emily's favorite haunt. Meanwhile, Will's fateful article on SD-6 resurfaces after a recovering junkie (Marisol Nichols) tempts him with her own conspiracy theory. Vaughn finally meets his father's killer when he is forced to work with Irina to save Syd from Sark's ambush in Russia.

CIA agent Jim Lennox falls under suspicion after his partner meets a grim end while searching for a gene-splicing machine that allows users to alter their appearance. So it's up to Sydney to sort out whether Lennox is the real deal or a double agent with his face. Meanwhile, Francie's life takes a startling romantic turn with the last person she would have ever imagined.

Sydney must make a life-defining decision regarding her future with the agency, while Sloane re-emerges and continues his obsessive quest to piece together the mysterious Rambaldi artifacts with the reluctant aid of a kidnapped scientist (Christian Slater). Meanwhile, Dixon's marriage is put to the test after he tells his wife the truth about his occupation, and Sydney's graduate school graduation is bittersweet.

The most shocking ally offers to help Syd bring down Sloane before he, Sark and the escaped Irina can steal a German company's genetic-coding technology. Meanwhile, Vaughn faces the music for his unsanctioned research into Derevko's true agenda and receives the oddest gift from his girlfriend's gal pal.

Rating: 5.7/9

For weeks, Syd and the CIA have been searching for the an abducted scientist (Christian Slater) with no luck. Their big break comes when his wife (Tracy Middendorf) reveals a shocker that strikes a nerve in Jack and sends Syd to Russia against her father's orders. Back in the States, a grieving Sloane deploys the newly evil Francie (or whoever she is) to uncover---and assassinate---the person responsible for Emily's death. However, the hit hits a snag that changes one agent's life forever. Diane: Yvonne Farrow.

Rating: 5.8/9

With just 48 hours to prevent the catastrophe, Sydney and Dixon mount a frenzied search for Sloane, who holds the key. But with revenge-crazed Dixon blinded by his wife's murder, Vaughn is pressed into a betrayal to keep the hunt on target. Later, an enigmatic monk (David Carradine) horrifies Sloane with the news that Emily's death---and the impending end of the world---may have been triggered by a sin he committed 30 years ago. On a much lighter note, a new Special Ops agent (Amanda Foreman) sets her sights on Marshall.

Rating: 5.0/8

Season finale, part 1

Two back-to-back episodes concludes the sophomore season for Sydney and the gang. Will is suspected of being a double and is arrested for espionage; Sydney confronts her mother, and Irina reveals her true motivation; and Sloane gets the ball rolling on his grand plan. Oh, and Marshall finds love with Megan from Felicity.

Rating: 6.0/9

Season finale, part 2

Framed by Francie's evil double, Will (Bradley Cooper) becomes a hunted man after the CIA targets him as a traitor. Syd is the only one who can prove otherwise, but Will's situation goes from bad to worse when Vaughn uncovers evidence that makes Miss Bristow doubt her fugitive friend's innocence. Meanwhile, Jack comes face-to-face with a "new" Sloane, who makes his old ally an unsettling offer; and Irina (Lena Olin) lures her daughter into a secret meeting that could lead to a major revelation...or an execution. Carrie: Amanda Foreman.

Jeff Habberstad, Stunt Coordinator, won an Emmy for this episode for Outstanding Stunt Coordination.

Rating: 6.0/9