When Sprig's Blue Moon Shell is stolen, he and Anne investigate to find the crook. To prepare for Anne's quest, the Plantars go to the archives and accidentally get trapped!
| Name | Type | Role | |
|---|---|---|---|
| Gloria Shen | Writer | ||
| John DiMaggio | Guest Star | ||
| Kevin Michael Richardson | Guest Star | ||
| Scott Menville | Guest Star | ||
| Jack McBrayer | Guest Star | ||
| Katie Crown | Guest Star | ||
| Chris Sullivan | Guest Star | ||
| Sam Riegel | Guest Star | ||
| Stephen Root | Guest Star | ||
| Dee Bradley Baker | Guest Star | ||
| Bert Youn | Director |