La Femme Nikita - Season 3 Episode 10 : Under the Influence 2001

Brothers Karl and Simon Peruze are responsible for some of the most vicious attacks on civilians ever recorded. Eliminating both of them proves difficult, since neither brother would ever give up the other. Section One kidnaps Karl, wipes clean his short-term memory, and places Nikita with him when he comes to, so she can pose as his fiancee and lead Section to Simon. Strangely, the more Nikita learns about Karl's cruel history, the more she is drawn to him, falling in love with him. However, Nikita's slowly dawning realization that her mind is being controlled by Section threatens to unravel the entire mission.