• 
  Irwin Allen

  regizor

• 
  Irwin Allen

  scenarist
• 
  Charles Bennett

  scenarist

• 
  Michael Rennie (I)

  Lord John Roxton
• 
  Jill St. John

  Jennifer Holmes
• 
  David Hedison

  Ed Malone
• 
  Claude Rains

  Profesorul George Edward Challenger
• 
  Fernando Lamas

  Manuel Gomez

• 
  Bess Flowers

  Guest at Zoological Institute Forum
• 
  Phyllis Coghlan

  British member of Zoological Institute Forum
• 
  Ray Stricklyn

  David Holmes
• 
  Bert Stevens

  Reporter at Airport
• 
  Stuart Holmes

  Zoological Institute Professor on Stage
• 
  Jay Novello

  Costa
• 
  Ben Wright

  BBC field reporter Ted Bottomley

• 
  Harold Miller

  Guest at Zoological Forum
• 
  Richard Haydn

  Professor Summerlee
• 
  Kenner G. Kemp

  Guest at Zoological Institute Forum
• 
  Ian Wolfe

  Burton White
• 
  Vitina Marcus

  Native Girl