Sci-fi films often share common codes and conventions to set the appropriate mood for audiences. Many involve storylines about exploring the unknown universe and galaxies to create a sense of mystery. They frequently feature skilled humans combating unusual creatures or aliens, as seen in films like Interstellar, E.T., and Star Wars: The Phantom Menace. These films also commonly include extraordinary human characters and abnormal looking creatures that don't exist in reality. Additionally, sci-fi films typically use the same settings of outer space and Earth to establish their genre and feel more realistic.