Larry Mitchell

Into Deep. When actionable evidence finally surfaces against Sean O'Neal, Upton and the team work relentlessly to build a case in secret. They discover Sean is more elusive and dangerous than anticipated.

In an upstairs/downstairs-type investigation, the CSIs look into solving two forensic mysteries.

Grissom returns from his teaching sabbatical as new member of the team, Michael Keppler desperately tries to keep his dark past hidden from his colleagues.

When two young boys are reported missing, a known neighborhood sex offender is the primary suspect.

A case involving a man's torched corpse whose bones and tissues had been harvested leads Nick and Keppler into the disturbing world of illegally sold human body parts.