Exactly at 9 minutes 26 seconds you can see the reflection of one of the filming crew on the glass pane of the window.
Even 18 months after the start of the infection, many towns and villages have perfectly manicured lawns.
Daryl, Bob and Michonne spend a lot of time and resources trying to liberate and start a minivan when there are many out there that don't need as much work.
Carol supposedly knew she was likely already a carrier of the illness and that some may never develop the deadly symptoms. Despite Lizzie not appearing very sick, Carol let her in to the quarantine area. This means that if Carol thought Karen and David would spread the illness, and didn't think she herself was a carrier too, then Carol was trying to kill Lizzie. Even if Carol's thinking was that Karen and David were too close to death and would turn, all she had to do was to lock their cell doors.
While planning the raid on the Vet facility, has 2 legs. In season 3, episode 2, Rick chopped off his leg to save his life.