Great show, but as is the case with many Sony releases, they simply stop releasing DVD's after a few seasons if they think that the show isn't selling well enough. They are notorious for ending the release of a series after a season or two. Some real geniuses working there. I'm now stuck with partial runs of Fantasy Island, Hart To Hart, etc... If you like to collect full runs of classic TV shows like I do, it's almost better not to buy the first seasons from Sony in the first place. They're the the worst, and obviously couldn't care less about their customers.