Firefly was a 2002 sci-fi series created by Joss Whedon.
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The series followed Captain Mal Reynolds and his pirate crew in their adventures across space.
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The series ran for 14 episodes and was cancelled in 2003 after one season.
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Serenity, a follow-up film to Firefly, was released in 2005 with a majority of the cast returning for a new story.
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Whedon was initially optimistic about a second Firefly season or another movie, but he's now involved in other projects.
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Fillion expressed his disinterest in returning for more Firefly, stating in 2016 that "enough is enough."
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As of 2019, it looks like a second Firefly season or a sequel to Serenity won't happen.
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