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 (season 3) - Wikipedia

King of the Hill Voices: Behind Favorite Characters

King of the Hill' May Get a Dang Ol' Revival – Texas Monthly

FOX Sunday Animation Domination (11.16.08)

King of the Hill [TV series] RARE promo advance soundtrack CD

King of the Hill, FOX Wiki

King of the Hill - Rotten Tomatoes

King Of The Hill' Revival Ordered By Hulu; Original Cast Returning – Deadline

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

Bobby Hill Will Be All Grown Up in the 'King of the Hill' Reboot - Okayplayer

Fox season finale dates: Which 12 shows are ending in May 2022?

The final scene from King of the Hill

Beavis And Butt-Head's Mike Judge Reveals Original Idea For Crossover Connection With King Of The Hill