Serenity: Those Left Behind is a 2005 three-issue comic book limited series published by Dark Horse Comics. It was written by Brett Matthews with Joss Whedon credited for story, illustrated by , and colored by Laura Martin. It is the first comic book series to be based on Whedon's short-lived 2002 television series Firefly and the 2005 feature film into which it was adapted, Serenity.