From left, David Berman, Marg Helgenberger, Jorja Fox, William Petersen and Ted Danson appear in a scene from the two-part series finale. (Sonja Flemming/CBS)
Holly Madison, center, sees a shark attack in a pool at the Golden Nugget during the 11th season. (Sonja Flemming/CBS)
Anthony Zuiker, a Chaparral High School and UNLV graduate earning $8 an hour as a Mirage tram driver, created "CSI: Crime Scene Investigation." (ROBERT VOETS/CBS)
The "CSI" cast is shown in 2000 at the beginning of its first season. Front: Marg Helgenberger and William Petersen. Back, from left: Paul Guilfoyle, Jorja Fox, Gary Dourdan and George Eads. (Monty Brinton/CBS)
Catherine (Marg Helgenberger) and Grissom (William Petersen) investigate the murder of an aspiring dancer killed backstage at a Cirque du Soleil in the seventh season premiere. (Robert Voets/CBS)
Yolanda McClary investigates a cold case during a scene from TNT‘s "Cold Justice." "CSI" character Catherine Willows, portrayed by Marg Helgenberger, was loosely based on McClary. (MELISSA LYTTLE/TNT)
Ceri Legg and her husband Peter look around at CSI: The Experience, located at the MGM Grand hotel-casino in Las Vegas on Saturday, Sept. 19, 2015. Joshua Dahl/Las Vegas Review-Journal
Captain Brass (Paul Guilfoyle, left) and Dr. Langston (Laurence Fishburne) are shown in a scenefilmed at Green Valley Ranch for the ninth season finale.(Sonja Flemming/CBS)
Sara (Jorja Fox, left) and Catherine (Marg Helgenberger) investigate a death during a scene filmed at the Golden Nugget during season 11. (Sonja Flemming/CBS)
D.B. Russell (Ted Danson), left, and Catherine Willows (Marg Helgenberger) were paired briefly during season 12. (SONJA FLEMMING/CBS)
Gil Grissom (William Petersen) packs up to leave during the ninth season. (Sonja Flemming/CBS)
From left, Catherine (Marg Helgenberger), coroner David Phillips (David Berman) and Dr. Raymond Langston (Laurence Fishburne) investigate a body discoveed next to Mandalay Bay on the ninth season finale. (Sonja Flemming/CBS)
Chauntray Johnson and Katrina Mims look around at CSI: The Experience, located at the MGM Grand hotel-casino in Las Vegas on Saturday, Sept. 19, 2015. Joshua Dahl/Las Vegas Review-Journal
Saying goodbye to ‘CSI’ — the show that changed how we see Las Vegas
View the photo gallery above.
Related: Timeline of "CSI" through the years
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