SOURCE: TV Guide

The September fifteenth through the twenty-first edition of TV Guide contains a preview for the upcoming thirteenth season of the show.
  Featured tidbits:

* This Sunday's season premiere will feature perpetual sad sack neighbor Bill developing adult onset diabetes in an episode entitled "Dia-bill-ic Shock".  Jake "Body By Jake" Steinfeld will guest star.

* Luanne Platter, who married Lucky in season eleven and became pregnant by him in the same season, will finally deliver her baby in a January episode.

King of the Hill's thirteenth season premieres September twenty-eighth.  Check your local listing for station and times.

- Source: TV Guide