CSI: Vegas is an American crime drama television series that debuted on CBS on October 6, 2021. It is a follow-up to the long-running series CSI: Crime Scene Investigation, and the fifth series in the CSI franchise. The series stars Paula Newsome, Matt Lauria, Mel Rodriguez, and Mandeep Dhillon as new characters. William Petersen and Jorja Fox reprise their roles from CSI: Crime Scene Investigation as Gil Grissom and Sara Sidle during the first season before departing, while Marg Helgenberger reprises her CSI: Crime Scene Investigation role as Catherine Willows beginning with season two. Wallace Langham, Paul Guilfoyle and Eric Szmanda also reprise their roles as David Hodges, Jim Brass and Greg Sanders, in a guest capacity.

Originally branded as an epilogue limited series, the show was renewed for a second season in December 2021, without Fox, Petersen, or Rodriguez returning. The first season consisted of ten episodes. The second season premiered on September 29, 2022, consisting of 21 episodes. On February 21, 2023, CBS renewed CSI: Vegas for a third season.On November 13, 2023, CBS announced the premiere date for its shows. The third season will premiere February 18, 2024, moving to Sunday nights.