Arthur Wiki
"Prove It"
Season/Series: 4
Number in season: 4b
Original Airdate: United States October 8, 1999[1]
Canada January 20, 2000[2]
Written by: Joe Fallon
Storyboard by: Jeremy O'Neill
"The Contest"
"The Blizzard"
Read transcript

"Prove It" is the second half of the fourth episode in the fourth season of Arthur.


D.W. discovers a passion for science, but her explanations for questions like why the sky is blue don't sound right to Arthur.


In the introduction, Brain explains how the Earth's rotation causes night and day. Arthur tells him that it is no use since he is talking to Kate and Pal.

Prove It

D.W. is frustrated because Arthur does not take her seriously. When Arthur and Buster watch a documentary for school, they will not let her watch. Arthur and Francine spell words, so that D.W. cannot understand them, and when the boys want to watch a movie, Arthur will not let her come either.

When Brain visits Arthur to do homework, he finishes early and D.W. talks him into watching a documentary with her and explain how a compass works. He tells her that scientists come up with dramatic experiments to prove they are right. D.W. is fascinated, since she enjoys being right.

At dinner, D.W. impresses the family by knowing the chemical formula for water, but Arthur claims that she is simply parroting him.

When Arthur wants to visit the Exploratorium with Brain and Mrs. Powers, D.W. wants to come too. Arthur claims that she is too young and Mr. Read agrees. Instead of making a fuss, D.W. calmly announces, that one day Arthur will beg to take her to the Exploratorium.

The next day, D.W. has set up a small Exploratorium in the backyard and shows the Tibbles and Emily around for money. She makes Arthur pay extra, but he is too curious to refuse. D.W. tells her friends a lot of nonsense. When Arthur objects, she tells him to prove he is right, which he cannot do.

Arthur fetches Brain to talk some sense into D.W. When they arrive at the Read house, it is full of preschoolers and Buster. Brain cannot prove that D.W. is wrong either, but he says that the correct explanations can be found at the Exploratorium. Arthur runs and begs his parents to let him take D.W. there.

On Sunday, Mrs. Powers takes Brain, Arthur and D.W. to the Exploratorium and she sees how things really are. D.W. does not mind, because she only intended to get Arthur to take her to the Exploratorium, thus proving she is smarter than him. Brain suggests that D.W. is a lot smarter than the boys think, which makes Arthur shiver.






  • A recurring gag is that Kate sucks onto a ball when she gets it.

Episode connections

  • This is the second time after “The Perfect Brother” that Arthur does not immediately know who Alan is.

Cultural references

  • The "NOVA" television program that Arthur and Buster watch is a real show, not to mention the fact that it is from PBS, the same company that provides Arthur (both shows are produced by WGBH).
  • When D.W. watches NOVA with Brain, the real-life footage shows Urquhart Castle on the shores of Loch Ness in Scotland.
  • The Exploraorium museum Arthur, D.W., the Brain and his mom visit is similar to the Franklin Institute, which is in Philadelphia, Pennsylvania. The name is also that of a similar museum in San Francisco, California.


  • When The Tibble Twins raise their hands, Tommy has Timmy's blue scarf and Timmy has Tommy's red scarf then in the next shot of the Tibbles they have their regular scarves again.
  • When D.W. gets the second lot of people in line, the Tibble Twins are seen in the line but a couple of seconds later, they are seen coming out of D.W.'s Explainatorium.


Main article: Prove It/Gallery