• 
  Bill Williams

  Capt. Mead Ralston
• 
  Linda Marlowe

  Dr. Helen Thomas
• 
  Norma West

  Jan Ralston
• 
  John Cairney

  Dr. Steven Thomas
• 
  Donald Churchill

  Carl Wolcott
• 
  Kathleen Breck

  Kate Saunders
• 
  Tony Doonan

  Dr. Griffith
• 
  Andrew Downie

  Capt. Burnett

• 
  Chuck Julian

  Webster
• 
  Max Kirby

  Ho-Ho the Holograph Clown
• 
  John Lee

  Dr. Garth
• 
  Mark Lester

  Don Saunders
• 
  Jeremy Longhurst

  John Saunders
• 
  Margo McLennan

  Joyce Walcott (as Margo Mayne)
• 
  Stuart Middleton

  Michael Thomas (as Stewart Middleton)

• 
  Bill Williams

  Capt. Mead Ralston
• 
  Anthony Honour

  Robert Walcott

• 
  Geoffrey Faithfull

  imagine
• 
  Colin Miller

  montaj
• 
  Harry Spalding

  scriitor