- State's Atty. Henry L. Harvey as Sonic
- Madge Harvey as Cream
- Chief Harold F. Robinson as Tails
- Irene Nelson as Amy Rose
- John Waldron as Dr. Robotnik/Eggman
- Dave Woods as Knuckles
- T.M. Wade as E-123 Omega
- Mac McCreery as Vector
- Paul Harris as Charmy Bee
- Det. Lt. White as Lucas
- Stone as Grounder
- Whitney as Coconuts
- A Suspect in the Police Line-Up as Espio (uncredited)
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