Sydney and Vaughn must convince bomb maker Daniel Ryan that they are part of The Covenant in order to find out where he has hidden one of his devices. But Sydney discover ...

While trying to retrieve a bomb, Sydney and Vaughn are ambushed by unidentified assailants. Meanwhile, Lauren and Sark continue to solidify their new partnership as the n ...

Sydney and Vaughn are sent to retrieve the Doleac Agenda to gain an advantage over The Covenant. For this, Sydney and Weiss must convince rogue security systems designer ...

Jack contacts a mysterious woman, that of former KGB agent Katya Derevko, Irina's older sister, to help him free Sydney and Vaughn, whose plane has crashed inside North K ...

In this episode, Sydney finally learns the shocking truth about her missing two years from an unlikely source: FBI Special Officer Kendall. Kendall whisks her away and ta ...

The identity of the mysterious St. Aidan forces Sydney to pull a stunned Will Tippin out of witness protection for help in finding Lazarey to clear her name. But the purs ...

After making a shocking discovery of a severed human hand in the desert that belonged to Lazarey, the Russian diplomat she murdered while working as a brainwashed assassi ...

When Sydney is taken into custody by the NSC honcho Mr. Lindsey, Jack and Vaughn have no choice but to ally themselves with Sloane to rescue her. But with only hours to s ...

Jack takes drastic measures to ensure that the NSC never finds out the truth about Sydney's murder of the Russian diplomat Lazarey. But, his actions place a heavy strain ...

Sydney's emotions are turned inside-out when she once again comes face-to-face with Allison Doren, the murdered Francie's doppelgänger, who was presumed dead but is now ...

While Vaughn's life hangs in the balance, Lauren butts heads with Sydney after learning the part she played in his stabbing. Meanwhile, Sydney further questions Sloane's ...

Sydney discovers a link to her missing two years in the form of Simon Walker, the dangerous leader of a group determined on retrieving deadly biological weapons. Meanwhil ...

Sydney and Vaughn are reunited again as a team to prevent Sark, now a head leader of the Covenant, from destroying the nation's satellite communications system. Meanwhile ...

Sydney's search for her past leads to an imprisoned Sark, but their QandA is cut short when he becomes the ransom for a pair of abducted CIA scientists by the Covenant, w ...

Having woken up in Hong Kong, with no memory for the last two years (!), Sydney returns to Los Angeles to try to piece together the last two years of her life and discove ...

Sydney Bristow is a young, athletic, college graduate who was recruited her freshman year as a Secret Agent for SD-6, a top-secret branch of the C.I.A. After a few years, ...

Sydney must confront her mother, who tells a clue about some Rambaldi artefacts in Zurich, but it was a trap to capture Jack. As Sloane keeps the latter in hostage, Vaugh ...

Sydney finds herself racing to clear Will's name when the Francie impostor frames him for the CIA intelligent leak by making him appear to be the other double of the Heli ...

Dixon struggles to deal with the death of his wife but returns to work after only four days, hellbent on tracking down Arvin Sloane. Vaughn questions his ability to cope ...

When the CIA intercepts a secret message, Sydney discovers that the life of Neil Caplan, the mathematician still held captive by Sloane and Irina, may be in danger from t ...

Following her betrayal, the CIA try desperately to track down Irina Derevko. Their trail on Derevko leads them to Stuttgart and closer to Sark and Sloane, even as Sloane ...

When Sydney learns that Vaughn is under investigation for being a double agent, Jack and Irina forge an unlikely partnership in their attempt to get their daughter out of ...

When Sloane gets his hands on a terrifying Rimbaldi weapon that causes internal spontaneous combustion, Sydney must turn to a betrayed and hurt Dixon for help. But when h ...

Sydney finally has the opportunity to leave the CIA for good, but a startling phone call from Sloane, combined with the kidnapping of a brilliant mathematician, brings he ...

When a young CIA agent dies, suspicion immediately falls on her parter and lover, agent Jim Lennox. But after Sydney rescues Lennox from captivity, She trikes up an insta ...

The entire world of 'ALIAS' is turned upside down. Sloane disappears mysteriously and Anthony Geiger becomes the new head of SD-6. As the Bristows struggle to keep their ...

Sydney and Vaughn reach a crossroads as they try to turn a professional relationship into a personal one during a mission to recover an experimental gyroscope. Meanwhile, ...

When Sydney learns that Marshall has been kidnapped, she struggles against a heartless Sloane to bring Marshall back whom is being tortured by the same Taiwanese torturer ...

Backed into a corner, Sark cuts a desperate deal Sloane using Sydney to recover a state-of-the-art surveillance system. But when the plan goes awry, SD-6 sends Marshall w ...

Still trapped in hostile territory in Pakistan, Sydney, Jack, and Irina continue their search for the missing nuclear warheads held by PRF's leader Gerard Cuvee. After se ...

Sark's alliance with SD-6 suddenly puts Sydney at risk of being exposed as a double agent. She has no choice but to cooperate with his plan, until his alliance with Sloan ...

As Vaughn's life hangs in the balance, Sydney has no choice but to turn to Sark for help in securing an antidote for the virus. But when Sark demands She help him to kill ...