page_title: William Petersen
hierarchical_section_title: William Petersen
caption_attribution_description: Actor William Petersen
context_page_description: William Louis Petersen is an American actor and producer. He is best known for his role as Gil Grissom in the CBS drama series CSI: Crime Scene Investigation.
context_section_description: William Louis Petersen (born February 21, 1953) is an American actor and producer. He is best known for his role as Gil Grissom in the CBS drama series CSI: Crime Scene Investigation (2000–2015).
caption: Petersen on the set of CSI in March 2004.
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