The first season stars William Petersen and Jorja Fox as Gil Grissom and Sara Sidle, while the second season stars Marg Helgenberger as Catherine Willows, reprising their roles from CSI: Crime Scene Investigation. It is a follow-up to the long-running series CSI: Crime Scene Investigation, and the fifth series in the CSI franchise. CSI: Vegas is an American crime drama television series that debuted on CBS on October 6, 2021.
