Plot summary
Michael learns that a failed assassination attempt on United States Senator Charles Irving is related to P9, a corrupt Division program that uses unsuspecting brainwashed victims that turn them into assassins. Michael and Nikita are joined by Owen, who reveals the scientist behind P9, Doctor Joseph Mars, also created the Regimen, and is looking for a cure to it. Michael is reluctant to trust Owen again, but the three join forces. They learn of another attempt on Irving's life by a woman named Alicia, they subdue her and send her to Birkhoff's home.
There, they learn she was a former drug addict, having been treated by Mars, who goes by an alias. They break into his office, finding several other test subjects. After Mars is captured, he sets out a signal, reactivating Alicia who returns to kill the real target, a member in Irving's administration; Michael and Nikita subdue her again. Owen leaves, having found the means to "detox" from the Regimen. It is later revealed that Owen is working with Ari Tasarov and Gogol in order to bring down Division.
Credits
Adapted from Wikipedia contributors, Nikita season 2. HTML formatting and reference markers removed.