Science fiction as a genre of film making has been an element of the cinema experience since the earliest days of the motion picture industry. These films have explored a great range of unique topics, including many that cannot be readily presented in other genre. Science fiction films have been used to explore sensitive social and political issues, while often providing an entertaining story for the more casual viewer. Today, science fiction films are in the forefront of new special effects technology, and the audience has become accustomed to displays of realistic aliens, space battles, energy weapons, faster than light travel, and distant worlds. This genre has produced many memorable films, as well as a number that can be considered mediocre or even among the worst examples of film production. It took many decades, and the efforts of talented teams of film producers, for the science fiction film genre to be taken seriously as an art form by many critics. The very best of these films may be scrolled below, or for Sci-Fi TV Series, select the green 'Televison Shows' heading on left, and then the 'TV Sci-Fi' option.