Cast Away

Summary
Arthur is thrilled that a weekend of fly-fishing with his dad means no D.W. for two days—but then a change of plans forces them to include her.

Plot
The episode opens with Arthur and his dad going to the new science museum. D.W. wants to go too, and her mom made her go with them because Kate's sick. At the museum, D.W. becomes scared and wants to see a unicorn exhibit. Her father goes with her, much to Arthur's disappointment.

Dad notices how upset Arthur is, and he offers to take him to Whale Lake on the weekend to teach him how to fly-fish.

He promises D.W. that he will take her where she wants to go the weekend afterward. Unfortunately, a change in plans cause him to take everyone to Whale Lake. D.W. wants to go fishing, but her father refuses. When teaching Arthur how to fly-fish, things go wrong when Arthur's hook repetitively gets caught on a tree while casting. When he successfully does so, he drops his rod in the water, and Arthur falls and sprains his ankle while trying to get it.

When Arthur is forced to stay at camp, his dad takes D.W. fishing. Much to Arthur's surprise, D.W. actually caught fish, thanks to her Mary Moo Cow CD.

It rains the next day, and Arthur and his father wear ponchos to try to catch fish. When they get back, they learn that D.W.'s Mary Moo Cow CD caused other fish to leap out of the water, much to Arthur's dismay.

When Arthur returns to the lake, his dad tells him he did a nice thing by being nice to D.W. When they are about to leave, Arthur spots the legendary whale in the lake that his dad always wanted to see. D.W. is upset that she didn't see the whale, but she catches a glimpse of it as they drive away, and remarks "Wow".

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