(One afternoon, Arthur switches the clocks from 3:30 to 4:00 and turns on the television. D.W. comes into the living room)
D.W. Read: Uh-uh-uh. Three-thirty is my T.V. time. Your time is—
(Arthur points at the clock on top of the television)
D.W.: I DON'T WATCH MARY MOO COW ON A CLOCK!
Arthur Read: It says four o'clock.
D.W.: Lucky for me, I can't tell time! (she changes the channel to her favorite show Mary Moo Cow) MOM! ARTHUR CHANGED ALL THE CLOCKS AGAIN!
Arthur: There's no fooling D.W. when it comes to Mary Moo Cow.
(at the supermarket)
D.W.: Mom, it's three-thirty!
(in the sandbox)
D.W.: Oh, no. It's 3:30!
(a duck repairman is fixing the television)
D.W.: Oh, you're too slow! (fixes it herself)
Arthur: If she couldn't watch this show, she'd go crazy! Well, crazier.
Mary Moo Cow: Thank you, boys and girls! That was fun! Will you sing it again?
Kids on T.V.: Yes!
Arthur: Wha-what are you waiting for?! QUICK, GO TO THE TITLE CARD!!!
Title Card (Super Sister)
Francine Frensky: (V.O.) The Last of Mary Moo Cow.
(Back to the story)
D.W.: She's coming!
Mary Moo Cow: So remember, boys and girls, I'll see you real soon when I visit—
Mary Moo Cow: And I can hardly wait! Moo to you!
D.W.: To you, too!
Mary Moo Cow: (sings to the tune of Are You Sleeping) Oh, D.W., oh, D.W., I love you.
D.W.: Really, Moo?
Mary Moo Cow: There is no one smarter.
D.W.: Yeah, tell that to Arthur!
Mary Moo Cow: Arthur?! Blech! (sings to the tune of This Old Man) I love you....
(D.W. and Mary fly off to Mary's barn)
(end of fantasy)
D.W.: Okay. I've figured it out. I can live in Mary Moo Cow's barn during the summer, then live here with you and Daddy and Kate the rest of the year when Arthur is in school.
Arthur: You're insane! They're not gonna put you on their show.
D.W.: Not they, she, Mary Moo Cow! (points at one of the dresses on her bed) This one.
Mom: Honey, there are going to be lots of kids there to see her.
D.W.: I know. That's why you can't tell her I'm related to Arthur. (she and her mother are in the car) Do you think Mary Moo Cow has spinach for dinner? I could eat it once or twice maybe, just to be polite, but not every night. Oh, and do you think she has bunk beds?
Arthur: Well, she's gone! That means....
Arthur and Buster: DARK BUNNY!
(at the mall)
D.W.: And I know Mary loves babies, so Kate could probably come and visit when Mary and me have our days off.
D.W.: I'm sorry. Mary can't take everybody.
Mom: Oh, my! I'm sorry, honey.
D.W.: What? What does it say?
(There is a sign on the door that says MEET MARY MOO COW AT 3:00 - CANCELLED)
Mom: No Mary Moo Cow today, I'm afraid. They've canceled it.
Dark Bunny narrator: In the rain-drenched streets of Dark City, where the sun never rises, 'only one person stands between crime and humanity...'
Mary: It's time for Mary Moo Cow!
Arthur and Buster: What?
DW: Mary couldn't come. Alright the party's over it's my turn now.
Mary: This is an extra special episode and do you know why?
All: Because it's our final episode!
Mary: That's right boys and girls L-A-S-T last come on let's sing it!
All: L-A-S-T that's our last no more Mary Moo Cow.
Both: All right!
Buster: What does that mean?
Arthur: It means Mary Moo Cow is history.
Both: L-A-S-T, that spells "last" No more Mary Moo Cow!
Jane: I'm sorry DW but that's what happens to all TV shows eventually they get cancelled.
D.W. wants the preschoolers to sign a petition.
D.W.: It’s called a petition. If enough of us sign it, then they’ll have to bring Mary Moo Cow back.
Tommy: Why would we want to do that?
D.W.: Because you can sign with finger paint.
Mary Moo Cow children singing about the petition.