A case gets complicated when the New York team uncovers an incident of evidence tampering at the crime scene.

The Miami team is surprised to find there’s more than meets the eye to a teen superstar’s fiery death on stage.

The CSIs are on the hunt for a man who walks away unscathed from a shootout that leaves two people dead and one injured.

The New York CSIs investigate the murder of a man who was run over and burned in an alley.

Eric Delko finds himself on the opposite side of his former colleagues when his work as a forensic expert for a defense attorney draws him into a case the Miami team is investigating.

Nick, Greg and Hodges’ surprise birthday party for Henry goes awry; Dr. Jekyll graduates to murder.

A 911 call brings the CSIs to a booby-trapped penthouse, where they find a mummified corpse–and learn that there might be other victims hidden within.

The team runs into trouble during the investigation of census worker’s murder when they run across a meth lab about to blow.

The New York team closes in on the Compass Killer as they try to prevent him from claiming his final victim.

A murder at a charity event draws the Miami team’s suspicions to the company hosting it–and to Jesse Cardoza, who appears to be following a woman at the party.

The Vegas team is on the case of a murdered bowling alley employee, whose severed head shows up in a bowling ball return during a tournament.

The Compass Killer takes another victim, but Mac has another problem on his hands–Flack has gone AWOL.

The CSIs attempt to determine what caused an SUV to crash into a car, killing two people and leaving several others injured.

The big CSI crossover event concludes in Vegas as Langston continues his desperate search for the missing Madeline Briggs.

The case of a missing Miami girl brings Vegas CSI Ray Langston from Horatio Caine’s city to Mac Taylor’s.