Gil Grissom
Fictional character
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Gilbert Arthur Grissom, Ph.D. is a fictional character portrayed by William Petersen on the CBS crime drama CSI: Crime Scene Investigation and its sequel, CSI: Vegas. Grissom is a forensic entomologist and for the series' first nine seasons, a CSI... Wikipedia
Played by: William Petersen
Born: August 17, 1956 (age 67); Santa Monica, California
City: Las Vegas; Costa Rica; Paris; Peru
First appearance: October 6, 2000; (CSI 1x01, "Pilot")
Last appearance: December 8, 2021; (CSI: Vegas 1x10, "Signed, Sealed, Delivered")
Other Appearances: Immortality; Without a Trace (6); CSI: Vegas
Rank: CSI Level III Supervisor; Entomology Specialist; Governmental Consultant; Freelance Consultant