William Petersen (Gil Grissom) and Jorja Fox (Sara Sidle) did not return as series regulars. Mel Rodriguez (Hugo Ramirez) also departed before the season began.
Season 2 Report: CSI: Vegas CSI: Vegas Season 2 premiered on , and concluded on May 18, 2023 , with a total of 21 episodes . This season marked a significant transition for the series, shifting focus from original stars Gil Grissom and Sara Sidle to a blend of new leads and returning legacy characters. Key Cast Changes and Returning Characters CSI: Vegas - Season 2
Marg Helgenberger reprised her iconic role as Catherine Willows , joining the main cast. Eric Szmanda (Greg Sanders) also returned in a guest capacity during the latter half of the season. William Petersen (Gil Grissom) and Jorja Fox (Sara
Jay Lee (Chris Park) was promoted to a series regular for this season. Core Storylines and Arcs This season marked a significant transition for the