“Serenity” was not aired until the end of the series’ run. This episode shares its name with the feature film Serenity, which continues the series after the final episode.
Malcolm Reynolds and Zoe Washburne are survivors of their rebel unit in the Battle of Serenity Valley during the Unification War, in which their side lost. They are now eking out an existence on the edges of space in their Firefly-class spaceship Serenity, taking odd jobs even if they involve petty crime. They take on passengers to supplement their income, but one has a secret that makes their lives more difficult.
Firefly stars Nathan Fillion as Malcolm “Mal” Reynolds, Gina Torres as Zoe Washburne, Alan Tudyk asHoban “Wash” Washburne, Morena Baccarin as Inara Serra, Adam Baldwin as Jayne Cobb, Jewel Staite as Kaywinnit Lee “Kaylee” Frye, Sean Maher as Dr. Simon Tam, Summer Glau as River Tam andRon Glass as Derrial Book.