Originally Posted by looky_lou

6th season, meaning the second half of the divided 5th season.

Season 5 is the final season, but it is divided into two 8 episode each segments. The first 8 airing currently and the final 8 airing next spring.

If you liked the pilot, you should definitely watch the whole series. Like others have said, it does slow down at times but that is where allot of the details are set that make sense in later episodes.