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.
King of the Hill (1997)
1 factual error in It's Not Easy Being Green - chronological order
Starring: Brittany Murphy, Pamela Adlon, Mike Judge, Kathy Najimy, Johnny Hardwick
Returning Japanese (1) - S6-E21
Plot hole: In this episode, Hank meets his paternal half brother. They look alike. However, we saw in an earlier episode that Hank's facial structure takes after his mother, not his father. Since they are paternal half brothers, then the Japanese brother cannot look like Hank since he has a different mother.
Dale Gribble: Boil up some Mountain Dew. It's gonna be a long night.
The Wedding of Bobby Hill - S3-E14
Trivia: During Hanks's conversation with Bobby when he tells him that he will have to marry Luanne, look at the shelf behind Bobby. There is a Bart Simpson doll there. A few years before this was featured the Hill family was in the crowd at one of the pee wee football games in the Simpsons episode "Bart Star".
Death of a Propane Salesman (2) - S3-E1
Question: Why does Kahn act so emotional about Buckley (especially when he criticizes Luanne for not crying)? Even though he says that he sought Buckley out and got to know him, there haven't been any signs of him befriending Buckley until now.
Answer: Mainly, Kahn wants to annoy Hank by praising Buckley, because Hank did not like Buckley. Also, when a person dies (or some other tragedy happens), there are often people who "use" the incident to get attention for themselves. They act like they are more involved/close than they really are. At least in my experience.
Answer: Because Kahn doesn't like Hank and Buckley annoyed Hank so much.
Captain Defenestrator