Serenity is a 2005 science fiction space western/epic film written and directed by Joss Whedon. It is set in the universe of the cancelled FOX science fiction television series Firefly, taking place approximately two months after the events of the final episode.In the film, Mal says that Simon and River have been on the ship for 8 months. In the Firefly episode "Trash", Mal says that he first encountered Saffron "bout a half year back".
"Serenity" was the original two-hour series pilot for the Firefly science-fiction television series created by Joss Whedon. However, FOX executives were not satisfied with this as a pilot, and so instead, "The Train Job" was created to be the pilot. "Serenity" was not aired until the end of the series's run.
Serenity is a fictional spaceship originally featured in the science fiction television series Firefly. It has also appeared in the comic book series and the film Serenity.