Obsada:

• Mark Hamill Himself - Narrator
• Steven Spielberg Himself - interviewee
• George Lucas Himself - interviewee
• Ridley Scott Himself - interviewee
• James Cameron Himself - interviewee
• Edmund Gwenn Dr. Harold Medford
• Bud Abbott Orville
• Walter Pidgeon Dr. Edward Morbius
• Anne Francis Altaira Morbius
• James Arness The Thing
• Michael Rennie Klaatu
• Warner Anderson Dr. Charles Cargraves
• Morris Ankrum Dr. Ralph Fleming
• Raymond Bailey Dr. Wahrman
• Gene Barry Dr. Clayton Forrester
• Noah Beery Jr. Major William Corrigan
• Lloyd Bridges Colonel Floyd Graham
• Edward Colmans Spanish Priest
• Frank Conroy Mr. Harley
• Robert Cornthwaite Dr. Carrington
• Sandy Descher The Ellinson Child
• Kirk Douglas Jonathan Shields
• Leif Erickson George MacLean
• Arthur Franz Dr. Jim Baker
• Bert Freed A.C. Barrows
• Ned Glass Wardrobe Man
• Billy Gray Bobby Benson
• Jimmy Hunt David MacLean
• Virginia Huston Carol Stafford
• Sam Jaffe Professor Jacob Barnhardt
• Jack Kelly Lt. Jerry Farman
• Harry Lauter Platoon Leader
• Lock Martin Gort
• Osa Massen Dr. Lisa Van Horn
• Cameron Mitchell Steve Abbott
• Leslie Nielsen Commander John J. Adams
• Ann Robinson Sylvia Van Buren
• William Schallert Ambulance Attendant
• Douglas Spencer Scotty
• Warren Stevens Lt. 'Doc' Ostrow
• Randy Stuart Louise Carey
• Barry Sullivan Fred Amiel
• Kenneth Tobey Capt. Patrick Hendry
• Joan Weldon Dr. Patricia Medford
• James Whitmore Sgt. Ben Peterson
• Grant Williams Scott Carey