• 
  Dave Goelz

  Uncle Travelling Matt
• 
  John Gordon Sinclair

  PK (UK version)
• 
  Richard Hunt

  Junior Gorg
• 
  Rob Mills

  Junior Gorg
• 
  Jerry Nelson

  Pa Gorg
• 
  Karen Prell

  Red Fraggle
• 
  Gord Robertson

  Pa Gorg
• 
  Patricia Leeper

  Ma Gorg

• 
  Terry Angus

  Muppet Performer
• 
  Lee Armstrong

  Muppet Performer
• 
  Tim Gosley

  Muppet Performer
• 
  Gerard Parkes

  Doc (as Gerry Parkes)
• 
  John Pattison

  Muppet Performer
• 
  Sandra Shamas

  Muppet Performer
• 
  Bob Stutt

  Muppet Performer