• 
  Mel Blanc

  Captain Caveman
• 
  Micky Dolenz

  (voice)
• 
  John Astin

  Additional Voices (voice)
• 
  Julie Bennett

  Additional Voices (voice)
• 
  Ted Cassidy

  Additional Voices (voice)
• 
  Stefanianna Christopherson

  (voice)
• 
  Henry Corden

  (voice)
• 
  Joan Gerber

  (voice)

• 
  Florence Halop

  (voice)
• 
  Pat Harrington Jr.

  Additional Voices (voice) (as Pat Harrington)
• 
  Hettie Lynne Hurtes

  (voice)
• 
  Nicole Jaffe

  (voice)
• 
  Ann Jillian

  (voice)
• 
  Casey Kasem

  (voice)
• 
  Jim MacGeorge

  (voice)