CSI: Crime Scene Investigation (also referred to as CSI) is an American police procedural drama television series that premiered on CBS October 6, 2000. The series, starring William Petersen, Marg Helgenberger, Laurence Fishburne, Ted Danson, and Elisabeth Shue, is the first in the CSI franchise. The series concluded on September 27, 2015, after 15 seasons, with a two-hour TV movie entitled Immortality. Wikipedia
Catherine Willows: How old were you when your father died?
Gil Grissom: Nine.
Catherine Willows: Little guy.