Alias 4×12: The Orphan
Nadia puts her own life - as well Sydney’s and Weiss’s - in danger after failing to unveil her past through a dangerous criminal. Meanwhile, Vaughn finds a person who is somehow connected to his father and Nadia as well.
Alias 4×11: The Road Home
Sydney must protect the life of a civilian, whom she unintentionally put in danger. Meanwhile, Jack plans a visit with an old friend, and Vaughn uncovers more disturbing secrets about his father
Alias 4×10: The Index
Dixon enlists Sydney to help him prove that Sloane is double-crossing the CIA and using APO to steel the Blackwell Index, a master blackmail list, and to reconstruct the Alliance. Sydney makes her way into Sloane’s house so as to copy the encryption key from his secure phone and crack his calls. When Nadia finds her, she becomes disappointed in her sister. Meanwhile, Vaughn discovers something disturbing about his father when he visits his comatose uncle.
Alias 4×9: A Man of His Word
While Nadia is in a coma, Sark is taken into APO to help them infiltrate Cadmus Revolutionary Front and retrieve the bomb, but in return he demands to see Lauren’s corpse and that Vaughn opens her coffin for him. Nadia may be the only person with the intel they need to intercept the bomb, so Jack is forced to prematurely wake Nadia from her coma, endangering her life, which doesn’t please Sloane when he finds out.
Alias 4×8: Echoes
Sloane temporarily steps down as Director of his Task Force and gives Jack full authority over the next assignment, which involves Anna Espinosa, Sydney’s old foe. However, Anna turns the tables on APO when she captures Nadia and forces Sydney to do her biddings. Sydney tells Nadia about the Rambaldi’s prophecy which dictates that two sisters will fight and only one will survive. Meanwhile, Vaughn visits Sark and tries to trick him into helping them to catch Anna. In the end, one of the sisters is mortally wounded by Anna.
Alias 4×7: Détente
First aired: 2/16/2005 Production Code: 404
While Sydney and Nadia argue about Nadia’s acceptance of Sloane’s fatherly concerns, Sloane worries about Nadia’s well-being when she and Sydney go undercover as wealthy, irresponsible young heiresses to uncover the whereabouts of a deadly chemical.
Alias 4×6: Nocturne
After being infected with a hallucinogen, Sydney starts to lose touch with reality. Vaughn and Jack must rush to find an antidote before Sydney puts her life - and others next to her - into danger.
Alias 4×5: Welcome To Liberty Village
Sydney and Vaughn are sent to infiltrate a training camp run by the October Contingent. Posing as a Chechen couple, they are taken to a former military base that has been designed to resemble a suburban American neighborhood. Sydney and Vaughn find themselves in a unique position of having to ‘learn’ how to pose as Americans. But these civics lessons have deadly consequences for the losers.
Alias 4×4: Ice
Sydney and Vaughn are sent on a mission by APO to obtain a sample of a new bio-weapon, known as Ice 5, which can literally freeze a person to death. When the agents learn the substance is going to be sold to a buyer in Damascus, together Sydney and Vaughn have to turn each of the family members against each other while remaining undercover. But when they are found out, there are devastating consequences. Meanwhile Nadia asks Jack for the truth about her mother, and Sydney begins to wonder if Vaughn has really come to terms with Lauren’s death.
Alias 4×3: The Awful Truth
Sydney must seduce a murderous arms dealer in order to track down a stolen NSA code-breaker. Meanwhile, Vaughn fears for Weiss’s life, and Sydney and Jack argue about telling Nadia the truth about her mother.






















