Episode List: Alias (2001-2006)

After learning that the man she has known as Michael Vaughn is under investigation and suspected of being a double agent for another secret terrorist group called Prophet Five, Sydney begins to question whether their business and personal relationship over the years had all been a lie. When she discovers that she's pregnant with Vaughn's baby, she becomes determined to uncover the truth about him.

Four months after Vaughn's murder by the traitorous Gordon Dean and his associate Ivan Curtis, a grief-stricken Sydney, teams up with Renée Rienne, a French freelance assassin and fugitive on the CIA's most-wanted list who knew Vaughn from their past association with Prophet Five, to ask for leads in order to track down the killers before they can strike again. Meanwhile, Jack enlists a reluctant new agent, Thomas Grace, as Vaughn's replacement at APO, and ...

Following the theft of a deadly virus, code-named Substance 33, in Turkey, Sydney is forced to partner on a mission with new APO agent Thomas Grace where they and Marshall travel to Prague to look for the stolen virus container where their paths cross with Rachel Gibson, a spy suspected of being involved in activities against the U.S., has something shockingly in common with Sydney that she's working for a black ops group called The Shed, that is run by Gordon Dean and his murderous...

While Sloane awaits the outcome of his sentencing for treason, a mysterious associate of Gordon Dean approaches him for a favor in exchange for persuading the judges to rule in favor of acquittal. Meanwhile, Sydney and Tom must try to convince Rachel to help them catch the fugitive Gordon Dean who moves his operations to more secure locations. Sydney and Rachel return to the ruins of the Shed's offices in Prague for Rachel to ...

Sydney and Tom travel to Marseilles, France when they discover that Renée has stolen the cryo container which contains the cryogenically frozen body of her supposedly dead father. But they soon find themselves under siege in Renée's warehouse hideout by a group of mercenaries who want to reclaim Renée's father when he wakes up from his cryo-induced sleep... so it appears.

After Sydney and the APO team infiltrates a formal party at the Chinese embassy in India to locate a fugitive arms dealer, named Janos Vak, Rachel is chosen to begin very first solo mission by infiltrating an off-shore oil platform, with com-links from Sydney whose pregnancy now limits her role in missions, to steal some computer software from Janos to gain the location of a new weapon.

Sloane decides to betray Dean when he learns that Nadia's condition will probably not improve. They meet at a race track in Dubai to exchange a network access card which Sydney and Renee stole in Rome, leading to Dean finally being captured. The APO interrogates Dean for information on Prophet Five. Yet another mysterious stranger asks Sloane to eliminate Dean. Meanwhile, Nadia comes out of her coma for a short time after a nameless nurse leaves her room.

An incident concerning a microwave bomb brings APO to send Rachel in Sao Paolo in order to take information about this weapon. However, another person who is named "Bob" is also after this information. Rachel has a fling with him, but back at APO, she finds out that he is Julian Sark. Meanwhile, Jack and an old friend are caught by Lazaré while on a stalking mission. Knowing Rachel has a clue to meet Stark, Sydney must deal with this foe in order to free her father from the hands of Lazaré in.

When Kelly Peyton steals some software from a CIA warehouse concerning the late Michael Vaughn, Sydney is soon abducted by Prophet Five agents where she is subjected to a hypnotic state making her flashback to her happier times with Vaughn in order to learn where a supposedly powerful device, called The Horizon, is located. Meanwhile, Jack must team up with Renée to locate Sydney when they captured and torture Aldo Desantis, while the mastermind behind Prophet Five is finally revealed...

After escaping from Peyton and her henchmen, and learning she's on a freighter at sea, Sydney goes to the communications room and sends a message to APO routed through the CIA to her whereabouts. Unbeknownst to her, the message is intercepted by a mole at the CIA working for Prophet Five, although APO was able to obtain a piece of the transmission. Wanting to retrieve Sydney, the APO team, Rachel, Tom, Dixon, and Marshall attempt to break into a secured server room located at Langley with the...

Now nine months pregnant and on maternity leave, Sydney is surprised when her mother, Irina Derevko, shows up at her front door pretending to be a victim pursued by Prophet Five to get information on the whereabouts of 'The Horizon'. Jack, Sydney, and Irina travel to Vancouver to a high-rise office building to steal the Horizon, only to get trapped on the upper floors when Peyton and his team show up, forcing Jack to do battle with them alone as ...

One month later, with Sydney on maternity leave, she gets forced back into the field when her old enemy, Anna Espinosa, returns after she's secretly sprung from prison by Peyton who gives her a job offer to work for Prophet Five whose leaders have secretly contact with Sloan to get him to set up Sydney in exchange for getting the cure for Nadia. Anna decides that to get at Sydney is that she needs to go through her friends, leading Anna to abduct Will Tippen.

While Sydney and the rest of APO try to learn more about Prophet Five and what their plans for Sydney are, Sloane finally acquires a bottle of serum from Prophet Five as a cure for the comatose Nadia. But Sloane becomes distraught when he learns that for it to work, he must stop Nadia's heart for a full 30 seconds. When the proceeder is successful, Jack becomes suspicious about Sloane's possible involvement with Prophet Five, leading him and Nadia to investigate, while the rest of the APO...

Visions trouble Sloane while he works for Prophet Five in deciphering the Rimbaldi Page 47 artifact. Meanwhile, a computer chip is found in the dead Renée's body leading Sydney to try to make contact with Vaughn.

Sydney must remain undercover and work with Sark to track down Rambaldi's final clue located in a prison in Italy before Sloan, Peyton, and the rest of Prophet Five finds it.

Sloane takes Rachel and Marshall hostage to force them to help him find the Rambaldi clue that he is missing. Sydney, Vaughn and APO try to save them by having Marshall's wife, Carrie, to help out, while Sloan plots with Sark and Peyton to take over Prophet Five for themselves.

In the aftermath of the destruction of APO, Sydney, Jack and Vaughn must find a way to stop Irina Derevko and Arvin Sloane from fulfilling the Rambaldi endgame of Armageddon.