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Firefly • 358 stories • Updated 19 Jul

So, in a fight between a vampire and a reaver, who's going to win? Is mystical demon essence or brain surgery the best way to enhance unsuspecting teenage girls? Would Xander be able to resist pointing out that Jayne is a girls' name? Two of the worlds of Joss Whedon collide in our collection of Buffy / Firefly crossover stories. See what slayers that were from Earth that was make of frontier like of the final kind, or what happens when Serenity finds its way back to the past.

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Kyra 'Jack' Serra. A minor trip into the hospital results in a major change. A change from petty thief and child, to a Big Damn Hero and strong young woman. xOver with Riddick
Only the author can add chapters to this story Firefly > Non-BtVS/AtS Stories • DearestDrusilla • FR15 • Chapters [19] • Words [122,314] • Recs [3] • Reviews [32] • Hits [13,792] • Published [30 Jul 12] • Updated [18 Jan 14] • Completed [No]
A man with a past and on the run from the Alliance hitches a ride on Serenity, but his very presence seems unusually upsetting to River...
Only the author can add chapters to this story Firefly > Non-BtVS/AtS Stories > Crossover: Dr. Who/Torchwood • (Past Donor)Starbug • FR15 • Chapters [8] • Words [17,874] • Recs [4] • Reviews [59] • Hits [39,472] • Published [26 Jun 08] • Updated [3 Apr 12] • Completed [Yes]
Buffy, Jack, and the Doctor accidentally land in a system where aliens fear to tread.
Only the author can add chapters to this story Firefly > Buffy-Centered >  • MoragMacPherson • FR18 • Chapters [15] • Words [15,042] • Recs [5] • Reviews [66] • Hits [38,503] • Published [15 Sep 08] • Updated [8 Jun 09] • Completed [No]
The crew of Serenity run into trouble when they decide to scavenge from a strange looking vessel. Luckily for them two men with more experience in these matters are already on their way….
Only the author can add chapters to this story Firefly > Spike-Centered • idontlikegravy • FR15 • Chapters [1] • Words [4,576] • Recs [0] • Reviews [3] • Hits [3,074] • Published [30 Sep 08] • Updated [30 Sep 08] • Completed [Yes]
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