Really great show and very interesting concept. Just finished season 2 (season 1 is on netflix) and I'm excited for season 3!

It's a CW show but is actually quite violent/action packed. Set in a space station (and then the Washington, DC area) 97 years after nuclear war destroyed most of civilization.

Highly recommended.

http://en.wikipedia.org/wiki/The_100_%28TV_series%29