The 2010 resurrection of La Femme Nikita, simply called Nikita, will star the smoking hot Maggie Q.
The theme song for La Femme Nikita is an original. The only piece of information I can share regarding this is that it was composed by renowned television composer, Mark Snow, of The X-Files fame.
The theme song is available in La Femme Nikita: Music From The Television Series, the official soundtrack of the show. The song runs for 1:02.
The video below has all the opening credits from seasons 1 through 5.