1. The Case of the Wandering Water / The Case of the Mysterious Melody

Someone -- or something -- is stealing water in Acorn Springs. A mystery singer in the woods matches Millie's voice in perfect harmony.

2. The Case of the Suspicious Snowflakes / The Case of the Missing Instrument

3. The Case of the Absent Acorns / The Case of the Slippery Sticks

4. The Case of the Bashful Ball / The Case of the Pond Monster

5. The Case of the Reckless Raven / The Case of the Friendly Oak

6. The Case of the Tall Tail / The Case of the Shooting Star

7. The Case of the Flying Fish / The Case of the Soggy Sculpture

8. The Case of the Super Sled / The Case of the Snowy Coat

9. The Case of the Clumsy Crane / The Case of the Snowy Secret

10. The Case of the Homemade Holiday / The Case of the Deputy Detectives