CSI: Crime Scene Investigation physical evidence to solve murders. The team is originally led by Gil Grissom (Petersen), a socially awkward forensic entomologist and career criminalist who is promoted to CSI supervisor following the death of a trainee investigator. Grissom's second-in-command, Catherine Willows (Marg Helgenberger), is a single mother with a cop's instinct. Born and raised in Las Vegas, Catherine was a stripper before being recruited into law enforcement and training as a blood-spatter specialist. Following Grissom's departure during the ninth season of the series, Catherine is promoted to supervisor. After overseeing the training of new investigator Raymond Langston (Fishburne), Willows is replaced by
Pilot (CSI: Crime Scene Investigation) introduces herself to Gil Grissom, who is the assistant supervisor of the graveyard shift. Grissom then asks her for a pint of blood and after that, Gribbs officially begins her shift. Nick Stokes and Warrick Brown both realize that they only need to solve one more crime to reach the level of CSI 3. The two eventually agree on a bet of 20 dollars that one of them will be promoted to CSI Level 3 by the end of the night. Catherine Willows jumps out of a car, saying goodbye to her daughter and her sister before rushing into the