A troubled teenager, Nikita, was rescued from death row by a secret U.S. agency known only as Division.

Percy and Michael take their latest assignment into protective custody, but Nikita finds their hideout and attempts to thwart their plan.

Nikita rescues Jill a journalist trying to expose a conspiracy involving Division and a major plane crash.

Nikita revisits her past when she posed as a nanny for an influential government official and decides to right the wrong of his death.

Division operative Owen escapes from a bank robbery and becomes a fugitive. Alex attempts to warn Nikita, but she is busted by Thom.

Division recruits are attacked by terrorists who kidnap Alex and Thom, both of whom are unaware that this is a test by Division.

Alex informs Nikita that one of the recruits has been activated to carry out a suicide mission.

If a U.S. senator agrees to help pass a bill that will continue to fund Division, the agency will cover up the senator's secret affair.

Nikita and Michael temporarily team up to kill a terrorist. Alex is caught going through medical files inside Division and creates a lie about Jaden, almost blowing her cover.

Percy frames a C.I.A. agent, Ryan. Nikita and Owen go to Chile in an effort to rescue Ryan from mercenaries, but they end up getting captured.

Alex is sent on her first kill mission. Birkhoff discovers the shell program that has been used to connect to Nikita in the outside world. Nikita is captured by Division.

Nikita realizes Division has implanted a kill chip in Alex's head, who is now an agent, given a cover job and invited to a party by her new neighbor, Nathan.

A plan to foil Alex's first assassination assignment goes awry when Nikita trusts the wrong person. When Division is alerted that Nikita is near, Percy sends Michael to kill her.

To help Ryan with a mission, Nikita must resume an old identity she had while undercover at Division.

While out on a mission, Alex runs into Irina, a woman from her past, and tries to help her. When Irina double-crosses Alex, it's she who needs saving.

Alex is sedated to help her heal after her last mission, but Amanda takes advantage of Alex's drugged condition to question her.

Michael confronts Nikita and reveals that he knows Alex is the mole. He gives Nikita 24 hours to find the man who killed Michael's family, or he will tell Percy about Alex.

Nikita goes to London with Owen to retrieve one of Percy's black boxes; there, the two disagree about what to do with it.

Alex and Jaden are assigned an overseas mission, but when things go awry, Alex must decide whether to try and save the mission ... or herself.

When Nikita goes to a small town after one of Percy's black boxes, she is shocked to find the guardian of the box has abandoned her post and is attempting to live a normal life.

Michael sends Nikita in to save the last person on the list of black box protectors, a CIA cryptographer named Malcolm.

Percy makes a move to take over the CIA, Alex goes rogue and Michael is trapped inside Division, unable to help Nikita when her life is in peril.