La Femme Nikita TV series, which ran on USA Network from 1997 to 2001. Pre-9/11, the show was downright prophetic.
The complete first season (22 episodes) was released on DVD two years ago. The second season is now finally available, and the third will be released in June. You may not want to purchase these sets like I am, but I highly recommend renting them (via Netflix or an equivalent).