• 
  Micky Dolenz

  (voice)
• 
  Bob Holt

  (voice)
• 
  Hettie Lynne Hurtes

  (voice)
• 
  Allan Melvin

  (voice)
• 
  Shirley Mitchell

  (voice)
• 
  Alan Oppenheimer

  (voice)
• 
  John Stephenson

  (voice)
• 
  Patricia Stevens

  (voice)

• 
  Janet Waldo

  Arlene Wilcox (voice)
• 
  Lennie Weinrib

  (voice)
• 
  Linda Hutson

  (voice)
• 
  Casey Kasem

  Shaggy (voice)
• 
  Don Messick

  Scooby-Doo (voice)
• 
  Heather North

  Daphne (voice)
• 
  Frank Welker

  Fred (voice)