Yes you do! You can purchase the first four episodes of S6 on DVD today.
I've never watched the show, other than maybe 15 minutes of one episode here and there.
When it first debuted I assumed it would be another liberal talkpiece but it appears I'm wrong.
Don't even need to buy them! They can be rented from Netflix, or any other DVD rental place. There are four episodes on each DVD. You can start with Season 1, and go right on through!