The Big Dig

Summary
After Grandpa Dave shows them a secret map, Arthur and D.W. hunt for buried treasure and learn some family history.

Plot
Grandpa Dave is sleeping and Arthur and D.W. are getting upset that they aren't having fun. When he wakes up he tells them about a treasure. It belonged to a pirate with bad breath, who was the most fierce pirate to sail the seven seas, but Arthur (who is the cabin boy in the story) steps in and says "Actually, there are eleven seas, sir". Blacktooth turns to him and breathes into his face, which causes Arthur to fall overboard.

Arthur takes the map while Grandpa Dave is asleep and convinces D.W. to take an oath, which she refuses. They find the treasure should be by the tree house, but they can't find it. Grandpa Dave shows and tells them there was no treasure, and that it was just a story. The kids are sad about this, and Grandpa Dave follows them home. At home, the kids are still disappointed. Grandpa Dave is still feeling bad, and tells the kids the truth. The two forgive Grandpa and he tells them the story about their Great-Uncle Matthew. Matthew and his crew, according to Grandpa, were in a lifeboat when a storm came; all they had was water, a compass and a checkerboard. When Arthur asked if this story was true, Grandpa said that it was, and then remarked that "Matthew was a fiend for checkers, just like me".

The episode ends on a good note.

Major Characters

 * Grandpa Dave
 * Arthur
 * D.W.

Minor Characters

 * Blacktooth
 * Jane

Trivia

 * When Arthur says there are 11 seas he is incorrect as there are more. Not counting the oceans they are 1. Mediterranean 2. Black 3. Yellow 4. Sea of Japan 5. Caribbean Arabian 7. Red  8. Baltic 9. Tasman 10. Arafura 11. Amundsen 12. Weddell 13. Bellingshausen 14. Caspian Sea.  There are many more.

Episode connections

 * The doll head Arthur pulls out of the couch bears resemblance to Grandma Thora's doll Clarissa from "Clarissa is Cracked".

Production notes

 * This episode was originally titled "Grandpa Dave's Great Big Fib".
 * As of June 2014, this episode holds the record for most storyboarders for a single episode, with 5.

Home Video
DVD:
 * Hooray for Health

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