Nicolas "Nick" Stokes is a former Crime Scene Investigator at the Las Vegas Crime Lab. He was promoted assistant CSI Supervisor to Catherine Willows who became Supervisor after Grissom left. After D.B. Russell arrived, Nick was demoted; Julie Finlay has now succeeded his position. In "The End Game" (Season 15, Episode 18), Nick left Las Vegas when he was named the Director of the San Diego PD Crime Lab.