Darth Solo said:

Ive given up after the finale of season 3, only as i moved house. But the general feeling is this season gets better then (without reading to much as i dont want any spoilers)?

You can view this entire season for free and in HD Straming at the official LOST site:

http://dynamic.abc.go.com/streaming/landing?channel=79517

It's well worth it. Be sure to scroll to the bottom of the episode selection, as the top episode is the finale. The first episode of season four is titled "The Beginning Of The End".