Alias episodes (Season 4)

This article contains episode summaries from Season 4 of the American drama/adventure television series Alias.

Authorized Personnel Only: Part 1

Original U.S. air date: January 5, 2005

• Directed by: Ken Olin
• Written by: J.J. Abrams, Jeff Melvoin

The show opens with a flashback from a scene of Sydney in hand-to-hand combat on a moving train. We learn that she is on a mission to recover an isotope with a fantastic name. Sydney and Vaughn reconcile passionately after their brush with death. The plot leads directly into a second hour entitled Authorized Personnel Only: Part 2.

Authorized Personnel Only: Part 2

Original U.S. air date: January 5, 2005

• Directed by: Ken Olin
• Written by: J.J. Abrams and Jeff Melvoin

Following the theft and delivery of an ancient sword, Sydney learns that her father had her mother executed to prevent a hitman from assassinating her. Sydney, Jack, Vaughn, Dixon, Marshall, and Nadia are recruited into a "legitimate SD-6" black ops division of the CIA dubbed "APO" (Authorized Personnel Only). The new division is headed by alleged "former villain" Arvin Sloane.

The Awful Truth

Original U.S. air date: January 12, 2005

• Directed by: Lawrence Trilling
• Written by: Jesse Alexander

Sydney seduces an arms dealer in order to locate a stolen National Security Agency code-breaking device. Team members rescue each other and Sydney and Jack argue about telling Nadia the truth about her mother's death. Jack manipulates Nadia into killing someone by leading her to believe that the person killed her mother.

Ice

Original U.S. air date: January 19, 2005

• Directed by: Jeffrey Bell
• Written by: Jeffrey Bell

Vaughn goes undercover as a priest with a dark past. He and Sydney set out to intercept a bioweapon called Ice Five, similar to the Ice Nine in Kurt Vonnegut's novel Cat's Cradle (it causes the water in the body to crystallize instantly at room temperature). Nadia has questions for Jack regarding her mother, Irina Derevko.

Welcome To Liberty Village

Original U.S. air date: January 26, 2005

• Directed by: Kevin Hooks
• Written by: Drew Goddard

Posing as Russian nationals, Vaughn and Sydney are brought to a "village" located in Russia that resembles a typical American town. It was once used to train KGB agents in how to blend into American society, but is now being used by a terrorist cell to train operatives in preparation for bringing down America's economy using an electromagnetic pulse weapon. Marshall discovers information in a book Irina Derevko used to contact her handlers. For some reason, some Russian group is trying to find Derevko.

• This episode strongly resembles an episode of Danger Man entitled "Colony Three" in which John Drake infiltrates a Russian facility that simulates a British town.

Nocturne

Original U.S. air date: February 9, 2005

• Directed by: Lawrence Trilling
• Written by: Jeff Pinkner

Sydney comes in contact with an infectious drug and suffers deadly hallucinations. Marcus Dixon tells Arvin Sloane he suspects him of having a treacherous endgame and threatens to kill him when the time comes.

Détente

Original U.S. air date: February 16, 2005

• Directed by: Craig Zisk
• Written by: Monica Breen & Alison Schapker

Sydney expresses her full hatred for Sloan during a mission to intercept a cache of an extremely powerful explosive called Black Thorine.

Echoes

Original U.S. air date: February 23, 2005

• Directed by: Daniel Attias

• Written by: André Nemec & Josh Appelbaum

Former K Directorate agent Anna Espinosa abducts and tortures Nadia. Sydney relates a Rambaldi prophecy that says that she and her sister must fight to the death. Sloane makes it clear that Espinosa is part of the Cadmus Revolutionary Front; a Rambaldi-obsessed group and will try to make the prophecy come true. Espinosa shoots Nadia, leaving her in a coma. Mr. Sark claims to have knowledge about the Cadmus Revolutionary Front and tries to cut a deal.

A Man of His Word

Original U.S. air date: March 2, 2005

• Directed by:Marita Grabiak
• Written by: Breen Frazier

Espinosa's bomb is assembled and ready for sale. Mr. Sark claims to be a man of his word and helps Sydney capture Espinosa while securing his own escape. Jack wakes Nadia prematurely to gain intel on the Cadmus Revolutionary Front. When Sloane confronts him, Jack claims to be a man of his word as well.

The Index

Original U.S. air date: March 9, 2005

• Directed by: Lawrence Trilling
• Written by: J.R. Orci & Alison Schapker

Sydney uses Nadia's birthday dinner as a pretext for stealing the key to Sloan's secure phone. Sydney and Dixon learn that Sloan has contacted old Alliance associates. The two conspire to give the CIA a corrupted key to an encrypted database--a master blackmail list. When Sloan arranges a meeting with his old associates, Jack presents them with the key to The Index. Jack is pistol-whipped when the key does not work. Nadia rescues him. Jack and Sloan finally gain access to the list. Vaughn receives a mysterious package from a mysterious 'fake nurse' while visiting his comatose uncle in the hospital. It contains a key that leads him to a journal written by his "late" father, which contains entries after the date of Vaughn's father's alleged death.

The Road Home

Original U.S. air date: March 16, 2005

• Directed by: Craig Zisk
• Written by: Alison Schapker & Monica Breen

Jack kills an old friend who is poised to receive a biometricly targeted weapon. Sydney confronts the weapon (miniature helicopter with automatic weapons fire and Artificial Intelligence) and saves an innocent civilian. Vaughn learns that his father was possibly a traitor.

The Orphan

Original U.S. air date: March 23, 2005

• Directed by: Craig Zisk
• Written by: Alison Schapker & Monica Breen

We learn more about Nadia's orphan past, her recruitment and her recruiter's treacherous background. In a search for his father, Vaughn meets up with none other than the headmistress of Nadia's orphanage in Lisbon. Vaughn asks her if she remembers anything out of the ordinary when his father stayed at the orphanage, which she replied she said she heard him say something about "Nightingale". She asks about Nadia, also.

Tuesday

Original U.S. air date: March 30, 2005

• Directed by: Frederick E.O. Toye
• Written by: Drew Goddard and Breen Frazier

The episode begins in Havana. Sydney rendezvous an informant by dancing with him. The information he gives is relayed to Dixon and leads to the recovery of a hard drive from a locker. Later, Sydney's taxi driver is shot and she is captured by the informant's boss. The informant is shot in the head and she is subsequently buried alive in a coffin, in the middle of a graveyard.

The hard drive turns out to have been booby-trapped by Third Faction. When inspected it detonates and releases cyclosarin. The biological nerve agent infects Dixon as he attempted to aid the technician who was inspecting the hard drive. Due to the release of the nerve agent, APO goes into lockdown mode for thirty-six hours.

Marshall, late for work, arrives at the parking lot only to be informed that they're in lockdown mode and that Sydney is trapped in a coffin somewhere in Cuba. Sydney is able to communicate with her cell phone that she still had. Because Marshall is the only one not affected by the lockdown, he is sent to Havana to find the graveyard where Sydney is buried; using a transceiver he rigged to locate her cell phone and retasking a thermal imaging satelllite, Marshall finds Sydney unconscious, but alive. Marshall and Sydney's mission is extended to Berlin where the man who gave them the phony hard drive is located. Since the man knows what Sydney looks like, Marshall is sent in to get a copy of the data using a remote scanner. Marshall accidentally shoots and kills him. Over the phone, Jack instructs Marshall on how to remove the man's eyes so that he can access a security station in the basement and deactivate a firewall. After doing so, Sydney and Marshall rendezvous and finally obtain a real copy of the hard drive, which they deliver to APO.

In the middle of it all, Marshall must sing his baby to sleep by phone with a song about the Lanthanide series. Though his wife is an NSA employee, he can never tell her where he has been.

Nightingale

Original U.S. air date: April 6, 2005

• Directed by: Lawrence Trilling
• Written by: Breen Frazier

While searching for Vaughn's father, Vaughn and Sydney discover that Nightingale is a molecular weapons system located in a nuclear reactor in Siberia. Sloan and Jack know about Nightingale and its connection to Elena Derevko. The duo later use Sydney to have Vaughn bring the information to APO and thus make it an official mission.

Meanwhile, a mysterious stranger meets with Vaughn in the UCLA library and promises answers about his father in exchange for the Nightingale's coil. Vaughn, Sydney and Jack travel to the Nightingale facility to shut it down and retrieve the coil from the weapon, however, Sydney becomes trapped in the room with the Nightingale device. Jack, Vaughn and Marshall attempt from three different locations to free her, which ultimately leads to Jack shutting down the nuclear core manually exposing himself to harmful radiation. With Sydney's help, Vaughn disappears with the coil to learn more of his father. Marshall later discovers what Jack did, but swears to keep Jack's secret.

Pandora

Original U.S. air date: April 13, 2005

• Directed by: Lawrence Trilling
• Written by: Breen Frazier

Vaughn makes an agreement with the mysterious man he met in the episode, Nightingale, to intercept a CIA shipment of a Rambaldi manual in exchange for information on his father, Bill Vaughn. In the process, Vaughn is forced to shoot Dixon to ensure the success of the mission.

Meanwhile, Nadia informs Sydney that she's been secretly seeing Katya Derevko. When Sydney confronts Katya, she learns that Irina did not put a contract on Sydney's life at all. Sydney tracks down a message from her mother that has been hidden inside a music box. The message is the number to a bank account under the name of Arvin Sloane.

Marshall dupes Jack into signing some papers, which Marshall uses to test Jack for mutations due to his radiation exposure. The test returns positive and Marshall confronts Jack informing him of the effects this may have to people he comes into contact with including Sydney unless he goes to a doctor.

Vaughn, after the success of the mission, learns that his father has actually been dead all this time and that everything, including the journal was forged supposedly by Sloane. Later, Jack reports to Arvin Sloane that Vaughn has returned and that the CIA was still in possession of the Rambaldi artifact. It was also mentioned that Dixon was merely shot in his vest and would eventually recover.

During the final moments of the show, a second man refered to as "Mister Sloane", and bearing his distinct resemblence is revealed in Santiago.

Another Mister Sloane

Original U.S. air date: April 20, 2005

• Directed by: Greg Yaitanes
• Written by: Luke McMullen

A physicist specializing in Quantum Electrodynamics is abducted in Krakow. In custody, Roberts, the mysterious man makes contact with "Marvin Sloane's" second in command to arrange a meeting to deliver the coil vital to what the imposter Sloane is building, but the meeting goes awry and the coil is stolen. Sloane convinces all that an imposter is responsible for the recent activities. After promising Nadia that he is trust-worthy, Sloane is allowed into DSR to examine the Rambaldi artifacts to determine the imposter's next move. Sloane loses it during the recovery mission and bludgeons a man to death for assuming that the Rambaldi technology is related to eternal life. The imposter escapes, but his power source (an immense sphere seen in a previous episode) remains. This episode make mention of a fictional chemical element, Zanthium 242.

A Clean Conscience

Original U.S. air date: April 27, 2005

• Directed by: Lawrence Trilling
• Written by: J.R. Orci

Jack seeks a doctor who might be able to cure his radiation poisoning, but the doctor cannot help him and tells Jack that he must tell Sydney. Sophia, Nadia's caretaker when she was young, calls her and she comes to Los Angeles. She reveals that she was beaten when someone came to look for Nadia. Meanwhile, Vaughn and Dixon go on a mission in Amsterdam to find an agent who might have gone rogue. Dixon's associate is actually pursuing leads on Hydrosek, a water-based weapon developed by Indonesia that could wipe out entire ecosystems and kill millions. Sloane (via Marshall) acquires intel on Sophia just to be sure she was telling the truth, but Sydney finds out. It is later revealed that someone has been watching Sydney and Nadia since they were young and acquiring information about them. It is then showed that Sophia is that person, who is actually Elena Derevko.

Mirage

Original U.S. air date: May 4, 2005

• Directed by: Brad Turner
• Written by: Steven Kane

Jack has been hallucinating visits with Dr. Atticus Liddell, a man that Jack helped relocate in 1981. Liddell specialized in radiation therapy and is believed to be the only man capable of improving Jack's health, only no one knows where Dr. Liddell is except for Jack. When Jack wakes up in a hospital, he thinks Sydney is his ex-wife, Laura. Sloane then asks Sydney to pose as her mother to get information from Jack that will lead to where Dr. Liddell is hiding. A fake house is set up and re-created to look like his former house in 1981. He reveals openly to "Laura" that he was relocating Liddell to Helsinki. Sydney subsequently finds him and brings him to APO to help Jack.

Sophia steals the Hydrosek recovered earlier and kills her ally after the heist.

In Dream

Original U.S. air date: May 11, 2005

• Directed by: Jennifer Garner
• Written by: Jon Robin Baitz

"Arvin Clone" raids a monastery for a Rambaldi orchid from which can be made an anti-aggression drug. One which his power source can reverse. In CIA custody he displays Sloane's memories. He is the product of an an SD-6 Psych-ops specialist's experiment. Sloane contaminated world water supplies when he was with OmniFam, and with the orchid, the "clone's" employer can render hundreds of millions passive, finishing what Sloane failed to do. The team decides to break the imposter by imprinting him with Sloan's most painful memory – the very thing that sparked his Rambaldi obsession. Sloane re-visits in his memory his dead wife, Emily, and the time when his baby, Jacquelin, died. Arvin Sloane must decide whether to return to Nadia and repair the damage he has done to the world or live in a dream.

The Descent

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Search and Rescue

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Before the Flood

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