|Airdate||October 2, 1993|
|Previous Episode||Sonic and Sally|
|Next Episode||Sonic and the Secret Scrolls|
Ultra Sonic is the 4th episode and the 3rd episode to be aired.
Sonic finds his long lost uncle, Sir Charles, after a failed mission in Robotropolis.
- Uncle Chuck
- Dr. Robotnik
- Scratch and Grounder (does not speak)