The 25 best science fiction movies of all time

What are the best movies about mysterious planets, visitors from other worlds, and the future on our very own Earth? Check out our picks!

10. 'Terminator 2: Judgment Day'

This 1991 action blockbuster directed by James Cameron continues the story of Sarah Connor (Linda Hamilton) and her son John (Edward Furlong), previously terrorized by a German-accented time-traveling robot bent on killing the future savior of mankind while he is still a child. The film begins with Sarah confined to a mental institution and John facing down an upgraded Terminator robot called T-1000 (Robert Patrick).

To vanquish this dangerous threat, the previous film's villain, the Terminator T-800 (Arnold Schwarzenegger), is sent back through time by an older John to battle the nearly indestructible T-1000. One of the most compelling parts of the movie is the way it humanizes the T-800, who becomes a father figure to young John Connor. And, predictably, the face-offs between two powerful robots are mesmerizing. 

According to Entertainment Weekly, Hamilton's identical twin, Leslie Gearren, portrays a cyborg Sarah Connor in the film.

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