D.B. and Finn hunt for missing Kaitlyn, while Sara convinces Nick to return to the Las Vegas Crime Lab ("Karma to Burn"), in the thirteenth season of CSI. Russell, Finlay and their team are met with the gruesome, the brutal, and the unusual, including a shootout at the CSI's favorite diner ("Code Blue Plate Special"), the murder of a runaway sex slave ("Wild Flowers"), a body in a piano ("It Was a Very Good Year"), the death of a police dog handler ("Play Dead"), the discovery of a mass grave ("CSI on Fire"), a plane crash ("Risky Business Class"), a news anchor killed on live TV ("Dead Air"), the murder of a Cuban singing sensation ("Exile"), a cheating scandal at a chess tournament ("Last Woman Standing"), and a body in a mud-bath ("Fearless"). Meanwhile, things get personal, as Russell's sons coach is murdered ("Pick and Roll"), a body is found on Warrick's grave ("Fallen Angels"), Brass learns more about Ellie ("Strip Maul"), NYPD Lab Director Mac Taylor heads to Las Vegas ("In Vino Veritas"), Phillips heads to a high school reunion ("Dead of the Class"), and an investigation into a series of Dante's Inferno killings bring the CSIs face-to-face Black Sabbath ("Skin in the Game"), before jeopardizing the life of one investigator.
