Sorry mods if this is in the wrong place. Spoilers for the season finale obviously. The group finds Andrea, but they can't bring themselves to kill her. They just leave her. Later on Rick and gang have this big shoot out with the Governor and out from the shadows appears zombie Andrea behind the Governor.
Here they have two choices. They end the Governor stuff this season and have him get some karmic retribution from being eaten by Andrea. Then the group kills her and leaves the prison which leaves their stability in doubt for season 4 or they save the "Governor being eaten bit" as the opener for season 4. I thought the season finale was very weak and doesn't entice me to come back for season 4 much at all.