CSI: Crime Scene Investigation
The Vegas crime lab that took over primetime. CSI premiered on CBS in 2000 and turned forensic science into television's dominant formula — William Petersen's Gil Grissom, The Who's "Who Are You" over the credits, and spinoffs from Miami to New York. It got so big that real juries started expecting what the show delivered every week.
Created by Anthony E. Zuiker, CSI: Crime Scene Investigation premiered on CBS on October 6, 2000, with William Petersen as forensic scientist Gil Grissom and Marg Helgenberger as Catherine Willows, leading a Las Vegas crime lab that solved murders through evidence rather than interrogation. The Who's "Who Are You" played over the opening credits, and the show's glossy, science-forward style looked like nothing else on network TV.
It caught fire almost immediately. By 2002 it was the second-most-watched show in America; it took the #1 spot for the 2002–03 season and was repeatedly named the most watched show in the world. Its formula became the template for the 2000s procedural boom, and the franchise cloned itself across the map — CSI: Miami in 2002, CSI: NY in 2004. The original ran 15 seasons and 335 episodes, ending September 27, 2015 with a feature-length finale, "Immortality."
The show's strangest legacy is legal: prosecutors began describing a "CSI effect," in which jurors raised on the show expected conclusive forensic evidence in every trial, and reported that conviction rates suffered in cases with little physical evidence. A television drama had quietly rewritten what ordinary people believed a courtroom should prove.
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