The movie was in fact made alongside a book of the same name by both director Stanley Kubrick and writer Arthur C. Clarke, so it’s also earned a spot in our best sci-fi movies based on books 2. RoboCop 2 (1990) R | 117 min | Action, Crime, Sci-Fi. 5.8. Rate. 42 Metascore. RoboCop returns to protect the citizens of old Detroit but faces a deadly challenge when a rogue OCP member secretly creates a new, evil RoboCop 2. Director: Irvin Kershner | Stars: Peter Weller, Nancy Allen, Belinda Bauer, Dan O'Herlihy. Votes: 934,784 | Gross: $78.90M. 7. Back to the Future (1985) PG | 116 min | Adventure, Comedy, Sci-Fi. 8.5. Rate. 87 Metascore. Marty McFly, a 17-year-old high school student, is accidentally sent 30 years into the past in a time-traveling DeLorean invented by his close friend, the maverick scientist Doc Brown. Over 300 Ranker voters have come together to rank this list of The 55+ Best PG Science And Sci-Fi Movies. Vote up your favorite PG sci-fi movies. Latest additions: Spider-Man: Across the Spider-Verse (Part One), Mighty Morphin Power Rangers: Once & Always. The best PG science fiction movies are fun for the whole family and ranked from best to 89 Metascore. The crew of a commercial spacecraft encounters a deadly lifeform after investigating an unknown transmission. Director: Ridley Scott | Stars: Sigourney Weaver, Tom Skerritt, John Hurt, Veronica Cartwright. Votes: 934,386 | Gross: $78.90M. The sci fi thriller that started the combo genre! 2. The Exorcist (1973) R | 122 min | Horror. 24/7 Tempo has identified 19 of the best best sci-fi films that explore time travel, based on user and critic ratings from IMDb and Rotten Tomatoes. Universal Pictures. 1. "Back to the Future 23 of the best space and sci-fi movies: new and old favourites - BBC Sky at Night Magazine. Our pick of the best space and sci-fi movies of all time, from newly-released blockbusters to all-time classics. Z9sHcvB.