Continuity mistake: When Hank and Bobby throw toilet paper over Junie Harper's tree, Hank is only able to throw one roll over the tree and after Bobby knocks over the birdhouse they have to run away. The next morning when Hank is driving Bobby they look over to see Junie Harper trying to get the toilet paper out of the trees, but there is now a lot more than just one roll.
King of the Hill (1997)
1 continuity mistake in Hilloween
Starring: Brittany Murphy, Pamela Adlon, Mike Judge, Kathy Najimy, Johnny Hardwick
It's Not Easy Being Green - S5-E16
Factual error: Boomhauer's car, Ms. Sally, has a Texas flag license plate on it. These plates were not issued until 1992, but Ms. Sally was driven into the quarry in the late 70's or early 80's.
Dale Gribble: Boil up some Mountain Dew. It's gonna be a long night.
More trivia for King of the Hill
The Man Who Shot Kane Skretteberg - S2-E7
Question: When we first meet Kane Skretteberg, what is the song he and his band are playing in the garage? It is right before they start singing Funcenter over and over.
Answer: If you are talking about the "Thou shalt not do this, thou shalt not do that" song, I'm not sure if a song like that actually exists. Green Day, the guest voices on the episode, might have just been improvising to keep their appearance from being too obvious.