Serenity is a futuristic sci-fi film that serves as a feature-length continuation of the story-line from the TV program Firefly (2002-2003). The story revolves around the captain (Nathan Fillion) and crew of the titular space vessel that operate as space outlaws, running cargo and smuggling missions throughout the galaxy. They take on a mysterious young psychic girl and her brother, the girl carrying secrets detrimental to the intergalactic government, and soon find themselves being hunted by a nefarious assassin (Chiwetel Ejiofor). The first feature-length film from Joss Whedon (The Avengers), Serenity is a lively and enjoyable adventure, replete with large-scale action sequences, strong characterizations and just the right touch of wry humor. An enjoyable viewing experience that stands alone without demanding that you have familiarity with the original program beforehand.