I initially bought Seasons 1, 2 and 3. I, of course, got hooked and ordered Seasons 4 and 5. I thought I'd ask for Season 6 and 7 as a Christmas gift for 2013, but just couldn't wait, so I ordered 6 and 7, too. To say the least, I love, love, loved the series. Very sorry that there wasn't more. Loved the characters and story lines. Do yourself a favor and order the entire series right now. It's the best.