Yes, 8 or 9 seasons are on Netflix. 

I started watching the show on Netflix earlier this month, and I'm on episode 20-some in the first season. It's a fun show, but one thing I didn't enjoy in the first couple of episodes were that it didn't really have a connection with the previous episode. They felt like random cases with no story progression about finding their father. It picked up mid-season but went back into that random territory. Hopefully this changes in the next few seasons.

Will give it a look, thanks. 

Woah, guess I've got a lot of catching up to do lol,and thanks for the tips!

I've been wanting to watch it, but I got this annoying friend who won't stop talking about the show, so I chose not to watch it. Maybe if he stopped talking about it, I'd consider it.
Does seem interesting though.

The finale was indeed awesome. I didn't expect Dean to die though but I sure as hell never expected him to become a demon. I wonder if he can smoke out like other demons or is his souls obund to his body. Or maybe he's like Kane 2.0 and can't die unless he's killed by The First Blade.

I saw the first five season but then I lost interest on the show (not because it was boring, btw). A good tv show. I highly recommend it.