What characters left on CSI?

Several key characters left "CSI: Crime Scene Investigation" over its long run. Notably, Grissom, played by William Petersen, departed at the end of Season 9, while Sara Sidle, portrayed by Jorja Fox, left briefly in Season 8 before returning. Other significant exits included characters like Warrick Brown (Gary Dourdan), who was killed off in Season 8, and Catherine Willows (Marg Helgenberger), who exited after Season 12. The show saw various cast changes as it evolved, impacting its dynamics over the years.