Continuity mistake: Episode 22, "Talking Shop": Whilst Bobby and Stacey are working on the car at the end, Bobby puts the wrench down on the car next to him. When he asks for the socket wrench, the wrench he had put down has disappeared.
Other mistake: When Boomhauer sees Katherine at the gas station, she says, "It's been twelve years." When Hank talks to Boomhauer in his garage, he mentions Boomhauer breaking up with Katherine twenty years ago.
Character mistake: Ben Stein asks a chemistry question about -273° Kelvin. The problem is, the scientific community never uses the word 'degrees' when referring to Kelvin. The correct way to say it would have been, "-273 Kelvin is also known as what?" Also Kelvin cannot be negative since 0 kelvin (approx -273° Celsius) is absolute zero.
A Rover Runs Through It - S9-E1
Continuity mistake: At the beginning of the episode, after Peggy's mother calls, Hank says "What's it been? Twenty years?" But they spoke with Peggy's mother during the events of the episode "Happy Hanks Giving." Hank spoke to her on the phone, Peggy shouted at the phone, and Hank commented on Mrs. Platter not approving of propane.
Death Buys a Timeshare - S9-E3
Plot hole: During a heatwave, the Hills are dying from the heat and even look for a pool to swim in to cool off.This makes no sense, they live in a ranch house which would have central air or at worst some window air conditioners.
Other mistake: In this episode, Peggy is terrible at gardening. In the fourth season, she brought flowers to the man who was making foot fetish videos. She said that the flowers were "so pretty" and were from her "own garden."
Deliberate mistake: Why wouldn't Hank just use a credit card to cover the outstanding payment he owes on his insurace? It was established in the episode Rich Hank, Poor Hank that Hank has an emergency credit card and could easily use that and would be covered immediately. His panic over not having insurance would outweigh any problems he might have with using his credit card and the fact that he is dealing with an insurance company there is no conceivable way they wouldn't accept a credit card or ask if he has a credit card to cover the payment. The mistake seems to be deliberate as it sets the story up for Hank going somewhat over the edge with protecting the house.
Continuity mistake: In the scene when Lane Pratley comes into the woman's changing room after the first game he is holding the player's cheques by his waist. When the shot changes to a closeup of him the cheques have instantly moved to Lane holding them next to his chest.
Redcorn Gambles with His Future - S9-E11
Other mistake: In the season four episode "Nancy Boys", when Nancy calls John Redcorn and tells him that she wants him back, he says, "I'm thirty-six years old. I don't need this crap." But here while John is talking to Hank, he mentions waking up one day and realizing that he is forty. If four years had passed since his break-up with Nancy, then Bobby and Joseph would now be sixteen and at least sophomores in high school, but they are still in middle school.
Gone with the Windstorm - S9-E13
Continuity mistake: Just after Dale, Nancy and Peggy get past the police blockade in the news van there is an overhead shot of the van and you can see Dale doesn't have his fake moustache on anymore. The next shot he is taking off the fake moustache.
Gone with the Windstorm - S9-E13
Continuity mistake: As Hank jumps out of the closest to scare the boy that is scaring Bobby, we see the contents of the cupboard as well. We see a shelf with a large number of boxes. Clothes rail with many clothes hanging on it. Finally an assortment of objects on the ground. When Hank leaves and the father is wondering where his son has disappeared to we see inside the cupboard again. Everything including the shelf, clothes and clothes rail have disappeared. The only thing remaining is one small box in the left corner.
Bystand Me - S10-E2
Continuity mistake: While Bobby's on the sign-up line, Dale complains it's not fair that only kids get paper routes, and Dale's watch vanishes from his left wrist, then reappears. The watch style also changes in the shots facing Dale. (00:03:20)
Bystand Me - S10-E2
Continuity mistake: The scene where Minh and Kahn are sitting together, they look into each other's eyes. When she is not looking right into his eyes, she has no earrings, when she looks into his eyes, she has earrings, then it zooms out and shows her with no earrings. (00:04:30)
Bystand Me - S10-E2
Continuity mistake: When Bobby encounters Harv at the Get In Get Out mini-mart, Harv's fingerless gloves vanish and reappear a few times until Bobby leaps into Dale's van. (00:11:00)
Bystand Me - S10-E2
Continuity mistake: While Hank, Peggy, and Bobby are asking for help picking up the papers with the dangerous ammonia and bleach recipe, a person in back of the group they are talking to that was originally wearing a dark red hat, red shirt, and blond hair switches to a pink, light blue shirt, and brown hair. A window also suddenly appears behind this individual, where there wasn't one before. (00:17:49 - 00:18:11)
Plot hole: Bobby teaches Peggy to ride a bike, but previous episodes show Peggy riding a bicycle, and once she rode across the entire town.
Orange You Sad I Did Say Banana? - S10-E6
Continuity mistake: While Ted and other Laotians are at Kahn's party, Kahn makes an offensive remark, and when Nguc begins to chastise Kahn the buttons on Nguc's shirt switch sides. (00:07:35)
Orange You Sad I Did Say Banana? - S10-E6
Continuity mistake: At the end, when the guys are standing poolside holding their beers, none are wearing watches and all are barefoot, but after Kahn tells Hank his dream of an Olympic size pool, Hank and Dale are wearing watches and Kahn is wearing flip-flops. (00:20:30)
You Gotta Believe (In Moderation) - S10-E7
Continuity mistake: As Ace hands back the giant cheque at the end, take a look at the 'pay to the order of'. It reads "The Winners" but in the next shot it reads "The Winner's".
The Year of Washing Dangerously - S10-E9
Continuity mistake: Peggy is looking out the kitchen window into the Gribble household, which is wrong. Khan lives on the kitchen side of the Hill household. The Gribbles live on the garage side.
