Leo loses his brothers in a portal and must venture to the mystic Hidden City to save them while dragging Señor Hueso along for the ride. He suspects that they are on the pirate ship run by Señor Hueso's brother Capitán Piel.
| Name | Type | Role | |
|---|---|---|---|
| Ron Corcillo | Writer | ||
| Russ Carney | Writer | ||
| Vladimir Radev | Producer | ||
| Ant Ward | Guest Star | Singing Pirates | |
| Eric Bauza | Guest Star | Señor Hueso, Kraken Pirate, Yōkai Pirate | |
| Rob Paulsen | Guest Star | Mermaid Pirate | |
| Eric Edelstein | Guest Star | Hidden City Police #1 | |
| Maurice LaMarche | Guest Star | Sea Serpent Pirate, Yōkai Granny | |
| Audrey Wasilewski | Guest Star | Hidden City Police #2 | |
| Andy Suriano | Guest Star | Singing Pirates | |
| Christian Lanz | Guest Star | Capitán Piel | |
| Andy Suriano | Executive Producer | Co-Executive Producer | |
| Ant Ward | Executive Producer | Co-Executive Producer | |
| Sebastian Montes | Director |