The actress explained that although tonight's (May 18) episode 'Homecoming' will feature "a little bit of hopefulness", viewers will first have to withstand a lot of tense moments.
"I certainly don't expect people to expect to happen what happens at the end," she told TV Guide. "I'm not saying it's not a possibility, but you would never think that it would go that way.
"The tables are completely turned. We're going to give [the audience] a little bit of hopefulness, but there's going to be a lot of shocker before there's hope."
She continued: "The overarching theme of season two being home, I think that in the end we understand what home is to her and what it isn't and how she's come full circle in that way, which is kind of beautiful actually."
Addressing the death that will occur in the Nikita finale, Maggie Q admitted that she was initially "torn" by the tragic plot twist.
"There will be loss, and I don't mean a plant. I understand all the elements that make this show work... so I was a little bit torn about taking a very important element out of what we've done for two years, a quality element.
"But at the end of the day, Nikita's journey has to move forward and, to do that, there has to be either some gain or some big loss. It has to be one of those things because only through those emotions do you grow. We rarely grow when we're happy; we grow when we're hurt."
Nikita was renewed for a third season by The CW last week.
The finale airs in the US tonight at 8/7c and Nikita's second season will premiere in the UK in June on Sky Atlantic.