No wonder Rick may be trying to break out of prison on The Walking Dead Season 4.
A mysterious new threat is on the way.
In an extended promo for cable's biggest show (first posted on TV Line) viewers learn how much time has gone by since The Walking Dead Season 3 finale, while we're also told that a non-Walker, non-human enemy will make its (his? her? WTH?!?) presence very strongly felt this fall.
Elsewhere, Carl meets up with some young friends and - GASP! - Michonne smiles. Prepare for the October 13 premiere as best you can and watch this four-minute trailer now: