A murder case involving extreme plastic surgery leads Horatio to Ron Saris, who is alive and seeking revenge on Julia.

Horatio takes point as the negotiator when an armed gunman storms CSI headquarters and takes hostages.

When doubt is cast on his murder conviction, a man receives a 24 hour stay of execution very little time for Horatio and the team to reaffirm his guilt or establish his innocence.

When a high school bully dies as a result of a stoning, the CSIs have to find out which nerd is responsible.

When a delivery truck driver and a housewife on his route are murdered, the CSIs try to find their connection.