| Title | Season | Episode # | First Aired |
|---|---|---|---|
| The Mystery of Dinosaurs | 4 | 40 | Saturday December 3, 2005 |
| The Mystery of Flight | 4 | 34 | Sunday October 23, 2005 |
| The Mystery of Plants | 4 | 31 | Monday January 1, 2007 |
| The Mystery of Size and Shape | 4 | 33 | Sunday October 16, 2005 |
| The Mystery of Stars and Planets | 4 | 39 | Saturday November 26, 2005 |
| The Mystery of the Five Senses | 4 | 35 | Sunday October 30, 2005 |
| The Mystery of Time | 4 | 38 | Saturday November 19, 2005 |
| The Mystery of Water | 4 | 36 | Sunday November 6, 2005 |
| The Mystery of Weather | 4 | 32 | Monday January 1, 2007 |
| Tracy's Candy Catastrophe | 3 | 30 | Saturday December 3, 2005 |
| Tracy's Shooting Star/Upsy-Downosis | 1 | 2 | Monday January 1, 2007 |
| Tracy's Treasure Hunt/Jay Jay's New Wheels | 3 | 21 | Saturday December 3, 2005 |
| Tuffy The Tiny Tow Truck/Snuffy's Snowman | 3 | 22 | Saturday December 3, 2005 |
| Tuffy's Buried Treasure/Snuffy's Thanksgiving | 3 | 23 | Saturday December 3, 2005 |
| Tuffy's Trip To Pangabula/Tuffy's Adventure In Pangabula | 3 | 26 | Saturday December 3, 2005 |
| Wing Wigglin'/Tracy's Tree | 1 | 9 | Monday January 1, 2007 |
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