I have a few suggestions, some have already been said and some not.
Revolution is a decent series, its based on life after an apocalyptic event where all of the power goes out and society breaks down into a pre-electricity era.
Plenty of swordplay, guns, hot babes & a hint of sci-fi, although i lost interest after the first few series - things got a little silly.
True Blood - Basically twilight for adults - my girlfriend is crazy for this, hot hunks, sex and lots of blood and magical shit.
Falling Skies - Produced by Spielberg, awesome series following a group of resistance fighters in the aftermath of an alien invasion.
and my all time favouraite...
Battlestar Galactica Amazing Sci-fi with some great SFX, epic space combat, tons of episodes that'll keep you occupied for weeks, great cast, and a really good storyline.
Quite a mature themed show, with politics & other moral issues involved too. (Note this is the modern, re-imagined series.)