On a salvage mission aboard a drifting colony ship, the Serenity crew find signs that the crew were killed by the cannibalistic Reavers. They find one survivor, but things take a turn for the worse when an Alliance ship looking for an unspecified Firefly-class ship with brother-and-sister stowaways shows up and takes them in.
Elenco: Nathan Fillion , Gina Torres , Alan Tudyk , Morena Baccarin , Adam Baldwin , Jewel Staite , Sean Maher , Summer Glau , Ron Glass .