If you were specifically looking for the 4th episode of Season 4, it is titled "Feeling the Heat" . It follows three heat-related cases during a Las Vegas heat wave, including a baby left in a hot car and a drowning at a lake.
A woman is found dead at a convention center, leading back to a couple who recently won a Hummer. CSI Las Vegas 4x4
The episode follows four different crime scenes investigated by different members of the team simultaneously. If you were specifically looking for the 4th
The full main team is active in this episode's multi-thread narrative: Played by William Petersen . Catherine Willows: Played by Marg Helgenberger. Warrick Brown: Played by Gary Dourdan. Nick Stokes: Played by George Eads. Sara Sidle: Played by Jorja Fox. Greg Sanders: Played by Eric Szmanda. The episode follows four different crime scenes investigated