Serenity ranked at number 44 in the "The 50 Greatest Sci-Fi Movies Ever" list, as voted by TotalFilm.com's readers.
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Serenity (2005)
Why We Love It: Joss Whedon’s witty dialogue is a joy and his Serenity is anything but serene: it’s a whole lot of butt-kickin’ fun.
Why You Love It: "Joss Whedon shows others *cough* George Lucas *cough* how to make a fun, realistic and interesting space film" - Natalie Benson
Source : The 50 Greatest Sci-Fi Movies Ever at TotalFilm.com