|From AMC's official walking dead website|
The 2nd season is currently underway and if you missed the 1st season (6 episodes), it may be hard to follow the story line specially if you haven't read the comic book.
No worries though, you can watch the entire 1st season in Netflix. If you have left netflix, this may be a good reason to come back and if you have not tired netflix, this may be a good reason to try it out. They give you a free month trial anyway - and this show is worth singing up for that free trial!