Yumi has a run-in with her old singing teacher, the snooty, opera-loving Madame Blubbery, who uses a hypnotic whistle to force Yumi to give up rock music and sing in her newly-written opera. Can Ami and Kaz get the old Yumi back?
| Name | Type | Role | |
|---|---|---|---|
| Ken Segall | Writer | ||
| Darrell Van Citters | Writer | ||
| Nancy Cartwright | Guest Star | ||
| Mark Kausler | Director |