Catherine Willows (Marg Helgenberger) is promoted to supervisor, leading Warrick Brown and Nick Stokes . Major Storylines & Milestones CSI: Crime Scene Investigation, Season 5 - Prime Video

The season's central interpersonal arc begins in the episode where an inquiry into Gil Grissom's (William Petersen) past handling of a case leads to significant fallout. Conrad Ecklie , the ambitious Assistant Director, uses the situation to split the core team into two separate shifts:

Season 5 of CSI: Crime Scene Investigation is defined by high-stakes internal friction, the professional evolution of the team, and one of the most famous finales in television history. The Team Divide