+++Warning, this contains minor spoilers from season one but no major season two giveaways.+++
The 23-episode second season of Nikita aired during the 2011/2012 TV season. It picks up right after the events of season one, with Nikita and Alex's relationship effectively having ended and Nikita and Michael's relationship restored. Now, Nikita and Michael are on the run with a hard drive called "the black box" containing the Division's darkest secrets and they plan to right the wrongs that Division has committed over the years. This allows the show to keep the procedural case-of-the-week format and then tie in larger serial arcs throughout the season. This season sees Miranda in charge of Division and Percy locked up in a cell in the basement, with Miranda manipulating Alex to keep tracking Nikita down. The season does have some twists and turns, which are, like the case-of-the-week elements, sometimes work and are sometimes silly. It does not ever stray too far from the formulaic approach, which I think is partly good and partly bad.
The Blu-Ray set is a four-disc set. As with the season 1 release, the show looks and sounds great in HD. The extras include a commentary track on the season finale, a documentary on the writers and the writing process, a feature on Maggie Q's health and nutrition regimen, just under half an hour's worth of deleted scenes, and a short gag reel. So, there is a decent amount of extras, especially for a show that has more of a cult following than wide, mass appeal.
Overall, the season is good. You definitely have to like action shows (or movies) whose plots can get a bit silly at times and be willing to just go with it. If you overanalyze things too much, you will definitely not enjoy it. The fight scenes are good and all of the actors do a great job with their characters. Melinda Clarke's role as Amanda is expanded a lot this season, and as she did on The OC, when she got more of a leading role, she crushes it. As in the first season, there is a lot of violence and some sexual content. Obviously, since it aired on regular broadcast TV they could not get too extreme with either, but they do take every opportunity to show off Maggie Q in skimpy outfits. Just, just be aware if that is an issue for you.