looks like this new clip on sci-fi is the first minute or so of tne 2nd half of the season. we see many of the Galactica crew after landing. Helo calls Adama over to tell him that it's the same all over the planet.. no human life which D'ana says that the cylons have pretty much found the same thing.
http://scifiwire.com/2.php
Full Version: sci-fi clip for season 4.5
After all these episodes, we still don't know if the planet that they found in the middle of season 4 is 'Earth'. 
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.