Sandy Duncan's Jekyll and Hyde

Cast

• 

  Don Messick

  Scooby-Doo (voice)

• 

  Casey Kasem

  Shaggy (voice)

• 

  Frank Welker

  Fred Jones (voice)

• 

  Nicole Jaffe

  Velma (voice)

• 

  Heather North

  Daphne (voice)

• 

  Sandy Duncan

  Sandy Duncan (voice)

• 

  John Stephenson

  Mr. Thayer / Duke Jason (voice)