How Did King of the Hill End on Fox?

The end of Fox's King of the Hill happened twice - first on the network itself and then in syndication. Which episode was the intended series finale?

King of the Hill Voices: Behind Favorite Characters

King of the Hill hanging up cartoon crown – Winnipeg Free Press

King of the Hill (TV Series 1997–2010) - IMDb

Hulu Is Reviving 'King of the Hill

King of the Hill FOX series finale

Johnny Hardwick's Body Too Decomposed to Determine Cause of Death

King Of The Hill : The Complete First Season - DVD - Region 4

King of the Hill Reboot Not Happening On Fox, I Tell You What - IGN The Fix: Entertainment - IGN

Are You Ready for a King of the Hill Revival?

Why did 'King of the Hill' end? - Quora

King of the Hill' actor Johnny Hardwick dead at 64

KING OF THE HILL / TV Script How I Learned to Stop Worrying and Love the Alamo

Johnny Hardwick, voice of Dale Gribble on 'King of the Hill,' dies at 64