The action explodes in the phenomenal fourth season when Sydney leaves the CIA to join a powerful new Black Ops unit, having no idea of the reunion in store for her.
Sydney quits the CIA and joins a Black Ops unit called "Authorized Personnel Only" alongside Dixon,… |
Sydney unwillingly teams up with her father to hunt down a modern-day samurai. Meanwhile, Nadia… |
Sydney must seduce a murderous arms dealer in order to track down a stolen NSA code-breaker.… |
S04E04 : Ice 7.64/10 (aired on 01/19/2005)Sydney and Vaughn go undercover to track down a deadly new bio-weapon. Meanwhile, Sydney is… |
Sydney and Vaughn go undercover as a married couple so as to find a weapon that could bring back… |
After being infected with a hallucinogen, Sydney starts to lose touch with reality. Vaughn and Jack… |
While Sydney and Nadia argue about Nadia's acceptance of Sloane's fatherly concerns, Sloane worries… |
Sloane temporarily steps down as Director of his Task Force and gives Jack full authority over the… |
While Nadia is in a coma, Sark is taken into APO and to help them infiltrate Cadmus Revolutionary… |
Dixon enlists Sydney to help him prove that Sloane is double-crossing the CIA and using APO to… |
Sydney must protect the life of a civilian, whom she unintentionally put in danger. Meanwhile, Jack… |
Nadia puts her own life - as well Sydney's and Weiss's - in danger after failing to unveil her past… |
When a mission goes wrong, Sydney's is placed in danger and Marshall is the only one who can save… |
Sydney and Vaughn risk their lives trying to find out the truth about Vaughn's father. Finally, we… |
In an attempt to talk to Sydney, Katya Derevko deliberately poisons herself and is temporally taken… |
Sydney and Vaughn tell Jack about Sloane's alleged involvement in Vaughn's search for his father… |
Nadia's former caretaker, Sophia, has been severely beaten. She contacts Nadia and asks to meet… |
Jack's illness has caused him to hallucinate about a cure. Sydney must recreate the time when Jack… |
The team captures the Sloane Imposter and questions him to find a rare Rambaldi orchid. The real… |
After a tactical group infiltrates the DSR and steals Rambaldi artifacts, CIA director Hayden Chase… |
Rambaldi's catastrophic endgame begins to fall into place as a giant red ball version of the… |
Jack, Sydney, Irina, Vaughn and Nadia parachute into Sovogda. They're supposed to dismantle a giant… |