Arthur's Knee

Agh, I cut my knee on the lima beans can.

Summary
Arthur doesn't want to tell his mother he hurt his knee because then she had known he was playing down at the dump—where he's not supposed to be.

Plot
For a school project about ancient Rome, Arthur and the Brain are constructing a life-sized chariot. When Arthur conducts a test run of the vehicle, a bad wheel causes the chariot to malfunction. Brain says they need to find a better wheel to fit the axle.

Arthur volunteers to get one, and the Brain goes home for lunch. When D.W. asks Arthur where he's going, he tells her he intends to find a spare wheel at the dump. Arthur isn't allowed to go to the dump, so D.W. threatens to tell on him unless he agrees to let her come along. With no other option, Arthur reluctantly agrees.

At the dump, Arthur finagles his way into the area where the trash is held while D.W. watches from safe ground above. Clawing through the dirt, Arthur finds a wheel from a broken bicycle and climbs back up out of the garbage area. During the climb back up, however, his sweater is torn on a spring and he cuts his knee on a lima beans can lid, leaving a painful wound. Arthur reflexively tosses the bike wheel away which lands next to the bike and returns home with D.W., avoiding their father in the kitchen so he won't find out what happened. Arthur cleans the wound himself, and tells D.W. not to say anything to their parents.

D.W. makes a get-well card for Arthur, and feels unsure what to do because of the promise she made not to tell on him. Nadine suggests that maybe she should tell, anyway. When D.W. reminds Nadine that she promised not to reveal Arthur's secret, Nadine tells her that regardless of her promise, this is a case in which she should confess to her parents about their trip to the dump and the fact that Arthur cut his knee, just as D.W. once bravely admitted to climbing and getting stranded in a tall tree.

Brain returns to the house, whereupon D.W. immediately asks him to go take a look at Arthur's knee, which is still throbbing. D.W. starts crying when she sees how much worse Arthur's cut looks, saying Arthur is really hurt and it could become even worse if he doesn't accept grownup help. The Brain agrees with D.W., explaining to Arthur that by cutting his knee on a dirty tin can, he put himself at risk of a myriad of illnesses and could develop a fever as his body tries to kill off the infection. D.W. reminds Arthur about the time she bravely confessed to climbing the tree and tells him he should be brave and tell on himself now, too. Arthur finally agrees that Brain and D.W. are right, and tells D.W. to go get their mother.

At the doctor's office, Arthur's wound is properly cleaned and he's given a tetanus booster to prevent infection. On the way home, Jane tells him she's proud of him for coming forth with the truth; as he exits the car, though, she stops him, saying she isn't quite finished with him yet.

Later, Francine and Sue Ellen ask if Arthur wants to come outside and play ball, but Arthur says he's decided to stay home for a while to think about how he violated his parents' trust by going to the dump. Francine and Sue Ellen express admiration for Arthur's attitude, with Sue Ellen saying “That’s really adult of you”. However, D.W. arrives and reveals that Arthur has actually been grounded, and his friends leave in the midst of laughter. D.W. leads Arthur inside, grounding herself to keep him company until he's not grounded anymore.

Characters

 * Arthur Read
 * D.W. Read
 * Pal
 * The Brain
 * Nadine Flumberghast
 * Jane Read
 * Sue Ellen Armstrong
 * Francine Frensky

Trivia

 * This is one of the two episodes to show blood. The other is “Vomitrocious.”
 * This is one of the episodes that focuses on health (with the others being Buster's Breathless, Germophobia, Operation: D.W.!, Binky Goes Nuts, Sick as a Dog and Arthur's Chicken Pox).
 * Due to being cut by dirty metal, Arthur needed a Tetanus shot, which he would have gotten anyway in about two years as a preventative measure, as it is typically recommended to receive a booster every 10 years.
 * Moral: There are just some problems too big not to come to an adult for.
 * Timeline:
 * The bike Arthur pulled a wheel off of is the same as Oliver Frensky’s old bike that he gave to Francine in "Stolen Bike" — although this would’ve been before it was repaired.
 * D.W. referred to the events of "D.W. Blows the Whistle", despite it not having aired yet when this episode debuted. In that episode, D.W. mentioned that she climbed a tree.

Cultural references

 * D.W. mispronounces the word “tetanus” as “”, which is the name of a video game.
 * Julius Caesar and the Romans are mentioned.

Episode connections

 * Arthur previously did a project on Ancient Rome in Team Trouble.

Errors

 * When D.W asked Arthur that he was going down into the dump to get the wheel, her lips don't move.

Home Video
VHS: DVD:
 * Arthur Goes to the Doctor
 * Arthur Goes to the Doctor
 * Arthur: The Complete Series 3