Arriving at a planet with a load of cattle for sale, Mal tells Simon and River to walk into town during the negotiations because "She makes things not be smooth". Simon becomes temporarily separated from River, but is relieved to find her enjoying herself for once, dancing a reel with the townsfolk. At the end, the two are captured and hauled off by settlers from another town, desiring to shanghai Simon as their doctor. This is an endearing one and shows the close relationship between Simon and River. It's also the first hint dropped about Book's murky past.