The Wire
Breaking Bad
Orphan Black (I've seen the first episode but didn't get around to the others yet because I'm watching so many other things)
The Walking Dead
Farscape
Babylon 5

I also need to catch up on Game of Thrones and Mad Men. And there's a lot of classic Doctor Who I still haven't seen. And I'm only about halfway through season three of The X-Files, and never did finish Eureka either.