On Borrowed Time (2) - S3.E22

Michael and Nikita are sent on an operation to find out who a pharmaceutical plant owned by a company named Genefex and a supplier of Red Cell who is selling a biological weapon named Gandium, too. Unbeknownst to Michael and Nikita, the operation has a secondary objective, to end Michael and Nikita's love affair once and for all. Once the mission objective is achieved, Nikita is sent to another part of plant, where Madeline is waiting to ""reprogram"" Nikita to eliminate her feelings for Michael. Meanwhile, Operations finally does the unthinkable, he sends Walter to ""retirement."" Birkoff has other ideas, and he immediately sets about sabotaging Walter's replacement, a young and innocent chap by the name of Giles.