The August 2008 issue of MySpace Dark Horse Presents included a single-shot, eight-page comic titled Serenity: The Other Half. While Will Conrad remained responsible for the artwork and Michael Heisler? stayed on as letterer, Jim Krueger? and Julius Ohta? were brought in as author and colourist. Joss Whedon? is credited as the executive producer. The story was later reprinted in August 2011 as part of the Better Days and Other Stories hardcover collection.
The story revolves around the Serenity crew aboard a hover-stagecoach, protecting it from Reavers as they try to deliver their seriously wounded passenger to their destination, in order to claim the second half of his fare. While helping Simon to keep the passenger alive, River detects that their passenger is an Alliance agent who tracks smugglers and leads Alliance soldiers to kill them. Aware that River may be the escaped psychic the Alliance is hunting, the agent tries and fails to shoot River when Simon is knocked unconscious. In return, River shoots the agent with his own gun, which she then disposes of. While the rest of the crew assume that stray munitions from the Reavers killed the agent, Mal takes River aside, tells her that he "had a bad feelin'" about the passenger, and welcomes her to the crew