Bonnie:

Count me in.
I would not watch season 1, because I refused to get hooked on a TV show that ran like a Saturday Afternoon Serial. You know, miss one episode & you are lost.
Friends told me I missed a great show. So, I watched season 2. It blew me away. That made me watch the season 1 dvd...of course, I knew a lot of the outcome.
Then I watched season 3 as it was broadcast.

So, now I am watching season 4.... Sure there are lots of plot holes and secondary plots that don't thrill... but it is like an amusement park ride... hang on and enjoy the rush.

Doug