• 
  Don Lusk

  regizor

• 
  Jeffrey Tambor

  Hard Rock
• 
  Rene Auberjonois

   Additional Voices (13 episodes, 1986-1987)
• 
  Barry Dennen

   Additional Voices / ... (13 episodes, 1986-1987)
• 
  Scott Menville

  Jonny Quest
• 
  Don Messick

  Bandit
• 
  Rob Paulsen

  Hadji
• 
  Granville Van Dusen

  Race Bannon

• 
  Borges de Barros

  Dr. Zin
• 
  Ezio Ramos

  Roger T. 'Race' Bannon
• 
  Araken Saldanha

   Petronius (4 episodes, 1986)
• 
  Orlando Vigiani

  Jonathan 'Jonny' Quest
• 
  Gilberto Baroli

  Dr. Benton C. Quest
• 
  Zezinho Cutolo

  Hadji
• 
  Carlos Alberto Vaccari

   Locutor (13 episodes, 1986-1987)