I started watching The Walking Dead during Season 3. True story...I was at New York Comic Con in 2011, I had a Vendor pass because my buddy had a booth and knew one of the guys from Reed Pop (Company that puts on NYCC) I ended up in the VIP actors area, I was right next to the cast of the Walking Dead. The guy who plays Rick was about 2 feet away from me and I thought he was a news reporter. The Reed Pop guy who I knew told me I wasn't supposed to be up here and that was the cast of the Walking Dead. I didn't watch the show until much later and then I got hooked.
I think season 4 wasn't the best because they separated the cast the whole time. Season 5 is supposed to be more action, more zombies, and the band is back together, I have high expectations.