American sci-fi and adventure shows, what's the best ones

Anyone seen the Lost season 5 finale yet?  I haven't liked much of season 5 but that was bloody amazing.  The cliffhanger they leave you on is just unbearable...can't wait until next year.

 

That was a bloody brilliant ending! I can't wait for it to come back.

I was thinking so much about that ending i even had a dream about it. 

^^^^^^ ^^^^^^

Nice to see there are more LOST fans about. I'm absolutely fanatical about it.

'Fringe' got really good. You can't go by the first epi tbh.

'Heroes' was steadily declining for me since Season 1. S2 was ok & S3 sucked, but S4 got a bit better.

As far as going  back for more sci-fi, you can't go wrong with the X-Files. I love Star Trek: The Next generation and Deep Space Nine myself...