Gilbert Arthur Grissom (born August 17, 1956 [1]), 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 Level III Supervisor employed by the Las Vegas Police Department.

Gilbert Arthur "Gil" Grissom is the former night shift supervisor at the Las Vegas Crime Lab. He quit his job to fly out to Costa Rica to reunite with his fiancée and former subordinate, Sara Sidle (One To Go).

He is best known for his role as Gil Grissom in the CBS drama thriller series CSI: Crime Scene Investigation (2000–2015), for which he won a Screen Actors Guild Award and was nominated for a Golden Globe Award; he was further nominated for three Primetime Emmy Awards as a producer of the show. [1]

Gil Grissom : I'm Doctor Gil Grissom and this much I know physical evidence can not be wrong. [Image changes to Cathrine Willows]

Gil Grissom was a main character in CSI from seasons 1 to 9. He was replaced by Laurence Fishburne who was later replaced by Ted Danson. He worked as a night shift supervisor and specialized in entomology, the study of insects. He is a rank 3 crime scene investigator.

William Louis Petersen (born February 21, 1953) is an American actor and producer, best known for playing Dr. Gilbert "Gil" Grissom on the hit CBS series CSI: Crime Scene Investigation and CSI:Vegas, and as Will Graham in the film Manhunter.

Sep 7, 2021 · Despite playing lead character Gil Grissom in CSI: Crime Scene Investigation for nine seasons, William Petersen decided to leave the series.

Gil Grissom : You look for mistakes in any lab, you'll find them. Dr. Phillip Gerard : I shouldn't be able to, Gil.

William Petersen is an American actor and producer best recognized for appearing as Gil Grissom in CBS’ drama series ‘CSI: Crime Scene Investigation,’ for which he earned a Golden Globe Award nomination and a Screen Actors Guild Award. He also garnered three Primetime Emmy Award nominations as the producer of the show.

Sep 27, 2021 · The intrepid investigators of "CSI" hunted the worst criminals the country had to offer over the series' 15-year run, but none of the investigators left an impression to match that …