Gender:Male

CSI Level:Three

Date of Birth:09/18/71

Height:5 ft 10"

Education:B.S. in Criminal Justice, Rice Unv

Weight: 155 lbs

Special Skills:Hair and Fibre Analysis

Hair Colour:Brunette

Known Relitives: Bill Stokes (father), Jillian Stokes (mother), several unnamed older siblings- five sisters and a brother.

Nick is currently single. When he was nine years old, Nick suffered molestation, at the hands of a last-minute replacement babysitter. He never told anyone until 2001, when he confided in Catherine Willows in episode 203, "Overload". Although it is never again directly addressed in the show, the manifestation of the trauma can be seen whenever Nick has trouble investigating crimes against children, especially during the episode Gumdrops. Nick was a member of a fraternity when he was in college (presumably Texas A&M University, as mentioned by his friend Eric in "Boom") and is familiar with fraternity hazing, as he tells a fraternity member in the fourth episode, "Pledging Mr. Johnson".

Nick seems to have had a happy childhood and is close to his parents. In the season five finale "Grave Danger," it is revealed that his father's nickname for him is "Pancho", and he in turn calls his father "Cisco" (a reference to the central characters in The Cisco Kid). His boss, Gil Grissom, later uses the "Pancho" nickname to calm Nick down while they are trying to rescue him from a coffin that has been rigged with explosives. Nick's father is also a Judge, as referred to by Grissom in the same episode.

Nick has a natural empathy with the people affected by the crimes he investigates. Other members of the team believe that it is better to maintain an emotional distance. This difference in outlook is a source of much comment and occasionally raised voices. Other than that, Nick is usually affable and gets along with his co-workers. He considers co-worker Warrick Brown a very good friend. He also often jokes and laughs with Greg Sanders even when the CSI was still working as a lab technician. He flirts and teases Sara Sidle which highlights their relaxed friendship.

In the Season 5 finale "Grave Danger", Nick was nearly killed when he was incapacitated using ether, put inside an acrylic glass coffin and buried underground while an installed web camera provided visuals of his plight to his coworkers who were initially helpless to save him. It turned out he was the target of an attack on the CSI team by a man whose daughter was implicated in a murder case. The deathtrap culminated when fire ants entered Nick's coffin and attacked him. Although Nick was in horrific agony in this ordeal, the ants gave Gil Grissom (who is an insect expert) a vital clue that allowed the team to determine his location. The box was also rigged with semtex explosive. Thus informed, Nick's coworkers rushed to his rescue and managed to save him from death.

Despite being one of the more well-adjusted members of Grissom's team, he has personally been the victim of a number of crimes during the course of the series: he has had his car (and all the evidence inside it) stolen ("Rashomama"); he has been kidnapped and buried alive ("Grave Danger"); held at gunpoint more than once ("Who Are You?"); stalked by Nigel Crane ("Stalker"); and thrown out of a second-story window ("Stalker").

During the sixth season of CSI, Nick grew an ill-advised moustache, but soon got rid of it.