So, I'm a sci-fi geek in many other ways, but I've never seen a single minute of Dr. Who. I know, sad. I'm also a little compulsive about seeing things in order. Should I see any previous incarnations of the show, or are they completely unrelated? When I go on Netflix I see many different doctors from many different decades. What gives?
You really don't need to have seen it before, I'm a UK resident so saw the first airings of this series as well as being a fan of old Doctor Who and its all self contained with lots of nods to the old episodes which are great if you know them. Previous incarnations are related, it is a continuation not a remake like the new Battlestar Galactica but I wouldn't worry about seeing them first. A lot of the really early stuff has been lost anyway.
It was originally conceived as an educational programme back in the day and has always been aimed at children (mostly to scare them) and the new series has young people in mind who may never have heard of 'Who' before. That said it is, like all good children's stories suitable for adults, with some very dark themes developed.
I have to say I loved this series and recommend it whole-heartedly to everyone. Don't expect hard sci-fi just an amazing adventure!