|Season 1, Episode 17|
|Air date||February 12, 2002|
|Written by|| Nina Shelton (Story)|
George Arthur Bloom
|Directed by||Larry Jacobs|
"Problem Solving in Shangri-La"
Something is amiss with the bliss of Sensible Flats. The reservoir is dry, the town is out of water, and the folks who live there are leaving as fast as they can. But why? When the kids and Digit arrive, they use line graphs to reveal the true story of what happened — and all lines lead to Hacker, the newest resident of Sensible Flats.
- Math topic: "Return to Sensible Flats" focuses on line graphs and how you can use them to keep track of changes and make predictions. They use one to show the water decrese in Sensible Flats.
- For Real Segment: "An Endless Cycle": Harry decides to ride his unicyle to visit with his grandmother, and uses a line graph to predict that he can make the 20-mile trip before dark.