You can't call yourself a sci-fi fan and have not seen this. While the whole demeanor of Serenity is darker and more serious than Firefly (with significantly less meddling on the behalf of Fox too), it's manages to fit in nicely without upsetting the existing canon, and retain some of its humor. For people who haven't seen Firefly, I recommend you go back into the TV archives and view the episodes BEFORE seeing Serenity.
The best way of describing the film is as a space-western, or a sort of space-opera. No tachyon emissions to follow, nor disruptions to the space-time continuum, just straight up outlaws staying one step ahead of their would-be captors while hiding an escaped Alliance human weapon and trying to keep their "gorram" ship from falling out of the sky. Joss Whedon does an excellent job of balancing action and plot, all while avoiding overdoing the CG (mostly because he didn't have the budget) and making it not look cheap (because he didn't want to). It is by far a labor of love, meant for the fans who rallied so hard and so long to revive their fallen beloved Firefly, and I am proud to call myself a browncoat.

we seriously need the full movie. this is one of the best sci-fi movies ever. we need the whole thing.

why isn't the whole movie available!!! only so many times i can watch the series!! oh, who am i kidding... i can watch it for ever!

This is a great show and I feel teased by HULU by them cutting down the online season to 5 episodes. I can only assume this is a temporary deal to make people buy the DVD's for Christmas because all the episodes were up about a month ago. Other then That I want a Sequel to Serenity

Its a good movie in its own right, great if you loved the series. It ties up most of the loose ends from the series, the stuff you could tell that the creators wanted to reveal over a few seasons. At least SciFi allowed the creators to do this much after prematurely ending this great show. Torrent the full version, there's no one's policing this movie.

what a great movie ....watched all the episodes, went out and bought the dvds it's got everything from compelling subjects, great acting, exceptional humor etc... any chance of another movie in the works? this could be greater than the Star Wars series....

I just watched all 14 episodes of Firefly. (July 2009........... 7 years later)..... I also never knew it existed... and simply loved it! I accidentially found out about the show when I was looking up "Nathan Fillion" who now plays on "Castle" (love him in that too). I'm off to get the movie "Serenity" And get this, it's at the local Library (for free). I'm so glad I didn't watch Firefly back in 2002, because I would have been pissed it got cancelled. Such a great show! And I'm not that crazy about Sci-Fi shows.... Awesome Series!

I saw Serenity on July 1st 2009, five years after it's release, and on the dvd I learned about the Firefly series. I guess you could say that I am out of the tv realm a bit because I have never heard of this series, that was canceled in 2002, it is now seven years later! The Serenity movie was excellent! Very original, the special effects were amazing, the acting superb! Even the dialog was original and funny at times! After watching the movie I am now going to find out if I can buy the Firefly series so I can enjoy more of this! Awesome!