The best sci-fi thriller movies of all time are often focused on themes such as time travel, aliens, and twisted realities. These films often leave viewers feeling uncomfortable and uncomfortable, while others showcase the exploration of artificial intelligence capabilities. The Spierig Brothers' "Predestination" explores the theme of time travel and the consequences that can emerge due to it. Coherence, which had a low budget of $50,000, is considered one of the best examples of this in cinema. Ex Machina is also considered one-of-two examples of cinema showcasing its innovative ideas and performances. The list also includes "Westworld" and "Ex-Caleb", a sci-fiction Western about an experiment by a man created by Alicia Vikaleb.