Gee whiz, I remember being glued to television watching Dark Shadows. Absolutely loved it.
Netflix has the first season(1966)which doesn’t have Banarbas in it, and then they have the 1967 season which is the first one that does have Barnabas. They will probably release more as time goes by. The thing is, you can watch them on DVD from Netflix. All you need is a 9.95 membership(per month)which allows you to get one DVD at a time(as many as you can squeeze into a month, depends on how fast you can mail them back)and unlimited instant play of over 12,000 movies and TV series(unfortunately Dark Shadows is on DVD and not instant). I am still glued to my TV when I get the disk from Netflix(they usually have about 9 episodes on one disk). I am still working my way through 1966:).