Episode Title:I Have Heard the Robots Singing.Episode Description:During the auditions for Griffin Rock Idol and the Rescue Bots' broadcast to the Rescue Bots' new recruits, everyone on Griffin Rock starts singing thanks to Doc's new invention called the Tone-O-Tuner after an accident with Huxley Prescott's van where Priscilla Pynch placed the Tone-O-Tuner she took to improve her singing.