Join or Sign In
Sign in to customize your TV listings
By joining TV Guide, you agree to our Terms of Use and acknowledge the data practices in our Privacy Policy.
Alias Season 4 Episodes
Season 4 Episode Guide
22 Episodes 2005 - 2005
Episode 1
Authorized Personnel Only: Part 1
Wed, Jan 5, 200542 mins
Five months later. Sydney quits the CIA and joins a Black Ops unit called "Authorized Personnel Only" alongside Dixon, Jack, Vaughn and. Sloane whom for limited immunity is co-operating with the APO. Meanwhile, the truth Sydney found out in Wittenberg endangers her relationship with Jack.
Episode 2
Authorized Personnel Only: Part 2
Wed, Jan 5, 200542 mins
Sydney unwillingly teams up with her father to hunt down a modern-day samurai, named Kazu Tamazaki. Meanwhile, Nadia is back home in Argentina and refuses to go back into the spy business. But she is forced to when Sydney's life is jeopardized when she's taken captive by the brutal Tamazaki.
Episode 3
The Awful Truth
Wed, Jan 12, 200539 mins
Sydney must seduce Martin Bishop, 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 with each other about telling Nadia the truth about her mother's death.
Episode 4
Ice
Wed, Jan 19, 200539 mins
Sydney and Vaughn go undercover to track down a deadly new bio-weapon. Meanwhile, Sydney is concerned about Vaughn not having yet put Lauren behind, and Nadia turns to a Jack to ask for his help in finding out the truth about her mother's murder, who tries to throw Nadia away from the evidence pointing to him.
Episode 5
Welcome to Liberty Village
Wed, Jan 26, 200540 mins
Sydney and Vaughn go undercover as an arms dealing married couple in a mock-up setting of American suburbia to find a stolen electro-magnetic pulse weapon that when detonated, could bring back the Dark Ages. However, the neighborhood they've infiltrated is not as charming as it seems.
Episode 6
Nocturne
Wed, Feb 9, 200540 mins
When Sydney gets bitten on the neck by a missing in action CIA agent, she soon finds out that she has been infected by a experiential hallucinogen, causing her to slowly lose touch with reality. Vaughn and Jack must race against the clock to find an antidote before Sydney puts her life into danger.
Episode 7
Detente
Wed, Feb 16, 200539 mins
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 Hilton-type heiresses to uncover the whereabouts of a deadly chemical from a playboy arms dealer.
Episode 8
Echoes
Wed, Feb 23, 200541 mins
Sloane temporarily steps down as director of his APO task force and gives Jack full authority over the next assignment, which involves Anna Espinosa, the former K-Directorate assassin and Sydney's old foe into racing her to go after stolen classified documents.
Episode 9
A Man of His Word
Wed, Mar 2, 200539 mins
While Nadia is in a coma after being shot by Anna, Sark is taken into APO to help them infiltrate the Cadmus Revolutionary Front and retrieve the stolen bomb, but in return he demands to see Lauren Reed's corpse and that Vaughn open her coffin for him.
Episode 10
The Index
Wed, Mar 9, 200541 mins
Dixon secretly enlists Sydney to help him prove that Sloane is double-crossing the CIA and using APO to steal the Blackwell Index, a master blackmail list, and to reconstruct the Alliance of Twelve. Sydney makes her way into Sloane's house so as to copy the encryption key from his secure phone and crack his phone calls.
Episode 11
The Road Home
Wed, Mar 16, 200540 mins
During a mission to Austria, Sydney must protect the life of an American civilian, whom she unintentionally put in danger after she acquires information about a new mini-helicopter to be used as a weapon. Meanwhile, Jack travels to Madagascar to visit with an old friend.
Episode 12
The Orphan
Wed, Mar 23, 200542 mins
Nadia puts her own life (as well Sydney's and Weiss's) in danger after failing to unveil her past about her involvement with a dangerous criminal, named Ceasar Martinez from her home in Argentina whom recruited her as an assassin for his gang and wants to relive old times.
Episode 13
Tuesday
Wed, Mar 30, 200543 mins
When a mission to Cuba goes wrong, Sydney is attacked and placed in serious danger of being buried alive in a sealed coffin. Back in Los Angeles, Dixon is exposed to a deadly pathogen released inside APO which is currently in lock down due to the toxin and Marshal is the only one who can get to Sydney and save her.
Episode 14
Nightingale
Wed, Apr 6, 200540 mins
Vaughn and Sydney, searches for Vaughns father, and the word Nightingale. Getting help from her father, telling him that Vaughns father might still be alive. Jack Bristow and Sloane have their own agenda. Following Jack Intel, Sydney and Vaughn goes to Munich.
Episode 15
Pandora
Wed, Apr 13, 200542 mins
On his own and desperate to find out more about his supposedly-dead father, Vaughn is pressured into a rogue operation for an unknown organization in exchange for information on the whereabouts of his father. He gains more than he bargained for in the deal.
Episode 16
Another Mister Sloane
Wed, Apr 20, 200540 mins
Sydney and Vaughn tell Jack about Sloane's alleged involvement in Vaughn's search for his father and Irina's contract on Sydney's life. After cornering Sloane, they both conclude that someone is framing him. Nadia fears that this pursuit may revive her father's past obsession Rambaldi.
Episode 17
A Clean Conscience
Wed, Apr 27, 200541 mins
Nadia's former caretaker, Sophia, has been severely beaten. She contacts Nadia and asks to meet her. Sloane is told by Sophia that she was beaten up, because someone is trying to track Nadia down, so he and Jack decide to tell their daughters the truth.
Episode 18
Mirage
Wed, May 4, 200541 mins
Jack's illness has caused him to hallucinate about a cure among other things. As a result, Sydney must recreate the time when Jack was working for the CIA and hid the only man who might be able to help him now. For this, Sydney must role play her own mother.
Episode 19
In Dreams...
Wed, May 11, 200542 mins
Sydney and the rest of the team finally capture the Sloane impostor and bring him to APO where they question him to find a rare Rambaldi orchid whose pollen has some miraculous capabilities with a Rambaldi device. However, the real Sloane must relive a painful memory with his late wife Emily.
Episode 20
The Descent
Wed, May 18, 200541 mins
After a tactical group infiltrates the DSR and steals all the Rambaldi artifacts, CIA director Hayden Chase discovers that the alarms at the DSR were disabled from Nadia's computer, allowing the raid to happen. Mrs. Chase shows up at the apartment to question her.
Episode 21
Search and Rescue
Wed, May 18, 200541 mins
Rambaldi's catastrophic endgame begins to fall into place as a giant red ball version of the Circumference/Mueller device is found floating over a large city in Russia, driving the citizens mad with violence. After a wounded Dixon reveals that Irina is alive, Sydney, Nadia, and Jack set off to find her.
Episode 22
Before the Flood
Wed, May 25, 200542 mins
In the ruins of the city, a CIA agent, Brodien reminds them that the Rambaldi device is broadcasting a sub audible frequency that physiologically alters people who drink the water-like fluid that has infected the city's water supply and it is irreversible.
