The CSIs are called to three different crime scenes in one night that are seemingly unrelated, but each case's forensic evidence reveals a common link.
While Langston testifies in the trial of a respected Congressman, new evidence sends the CSIs back to the lab to reopen the investigation.
Langston and Nick are called to investigate a murder at a fast food restaurant and have quite a task ahead of them when they discover that much of the evidence is coated in cooking oil.
The CSIs are called in when an undercover FBI agent is found brutally murdered. The CSIs must help the victim's parter find the killer.
Dr. Langston's first day as a CSI. A simple robbery case for Nick and Raymond suddenly overlaps into an arson and murder case.
Gibbs has to put his personal feelings aside and work with Trent Kort who returns in order to track down a dangerous criminal.
When a kid discovers a weapon that someone was killed with, the entire family ends up under investigation, as the NCIS team has to find out who was the last one that used the weapon and who got shot with it.
The death of a boxer leads Vance to borrow the NCIS team and start investigating his death, while Gibbs digs into Vance's past.
The CSI team works to close Grissom's last open case, the "Dick & Jane" murders, as Grissom prepares to leave the team for good. Before leaving, Grissom offers Dr. Raymond Langston, who helped the CSI's with the "Dick & Jane" case, a permanent position as part of the CSI team.
When a new murder leads to a connection with an infamous serial killer, Grissom secretly joins the class of well-known criminal pathologist Dr. Raymond Langston (Fishburne), to gain access to the killer and get a crack in the case.
