Alias 4×22: Before the Flood
Jack, Sydney, Irina, Vaughn and Nadia parachute into Sovogda. They’re supposed to dismantle a giant red ball turning people into zombies. At APO, Marshall and Weiss use the Blackwell Index to blackmail the Russian minister into giving them the access codes to a Russian satellite, they discover that Elena is uplinking the satellite. A CIA agent, Brodien reminds them that the Rambaldi device is broadcasting a subaudible frequency that physiologically alters people who drink it and it is irreversible. Elena learns of the APO team’s arrival.
Alias 4×21: Search and Rescue
First aired: 5/18/2005 Production Code: 421
Rambaldi’s catastrophic endgame begins to fall into place as a giant version of the Circumference/Mueller device is found floating over a city in Russia, driving the citizens mad. After a wounded Dixon reveals that Irina is alive, Sydney, Nadia, and Jack set off to find her. Irina had been captured, and then duplicated using Project Helix, in order to give the impression that she was dead.
Sydney and Nadia discover Irina is being held inside a camp in Tikal, safely in the clutches of Elena’s army. Irina had apparently been working to counter Elena’s organization, the Covenant, and actually PREVENT the Rambaldi endgame. Now they have to work to make sure that there is no other way to bring about the endgame.
Alias 4×20: The Descent
After a tactical group infiltrates the DSR and steals Rambaldi artifacts, CIA director Hayden Chase discovers that the alarms at the DSR were disabled from Nadia’s computer, allowing the raid to happen, and shows up at the apartment to question her. Soon Sloane and Jack arrive and suspect that Sophia, who had access to the computer while she was living with Syd and Nadia, is Elena Derevko. They follow her trail to a dead Rambaldi follower, a stunning betrayal, and a presumed dead family member…
Alias 4×19: In Dreams…
The APO team sets a trap in Paris that manages to snare the Sloane impostor. After Jack uncovers the origin of the Sloane clone, Marshall devises a way to shock him back into his own reality. But this technique poses a potential danger to the real Sloane.
Alias 4×18: Mirage
Jack’s illness has caused him to hallucinate about a cure. 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 play her own mother. Meanwhile, Sophia moves in with Sydney and Nadia.
Alias 4×17: A Clean Conscience
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 – Elena Derevko, the third and the cruelest of the Derevko sisters, has been surveilling both Sydney and Nadia for a decade. Meanwhile, Jack’s doctor advises him to tell Sydney about his illness.
Alias 4×16: Another Mister Sloane
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. The APO team set a trap to catch the fake A. Sloane, but they fail. Once they realize what “Arvin Clone” is after, Sloane suggests to step down, temporarily. However, Sydney reluctantly convinces him to stay on the case, since he may the only person able to anticipate “Arvin Clone”’s next move. But Nadia fears that this pursuit may revive her father’s past obsession – Rambaldi.
Alias 4×15: Pandora
In an attempt to talk to Sydney, Katya Derevko deliberately poisons herself and is temporally taken out from her cell. Once Nadia tells her sister about this, Sydney visits her aunt to tell her to stay away from Nadia. However, Katya unsettles Sydney by telling her that someone framed her mother as a means of getting her killed. Sydney sets off in search of the truth behind this story. Meanwhile, Vaughn becomes a rogue agent by getting involved with the people who might know his father’s whereabouts. In the end, he and Sydney find out that the man behind these two plots is no other than A. Sloane. However, things are not exactly as they seem to be.
Alias 4×14: Nightingale
Sydney and Vaughn risk their lives trying to find out the truth about Vaughn’s father. Finally, we find out why Jack and Sloane seem to be conspiring together against Sydney and Vaughn.
Alias 4×13: Tuesday
When a mission goes wrong, Sydney’s is attacked and placed in serious danger. Meanwhile, 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 save Sydney. Only with com link help from APO Marshal has to do a very important mission before it’s too late.






















