Thanks to 6Spike for the heads up.
* Rick's controversial decision to relocate the denizens of Woodbury to the prison is paying off on the safety front (i.e. 30 days without a zombie attack). It's also creating a potentially deadly false sense of security.
* Rick's screws are starting to tighten (i.e. 30 days without seeing dead people).
* The gang stumbles on a potential new home base, where the current residents are tracking the number of days since the last attack on a chalk board.