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So long, Cathrine. This episode marks the final one for the long-time, iconic character.
This is the first of Catherine's final two episodes. It features Annabeth Gish as a guest star.
The home of Dr. Robbins becomes a crime scene on this edition of CSI. It's the final installment of 2011.
A retired Army Ranger is found dead this week. As a result, the FBI is brought in for the case.
After years of pursuit and a countless number of murders, Langston comes face-to-face with serial killer Nate Haskell inside the house where his killing spree began, on the eleventh season finale.
This is the 250th episode of CSI. In it, Langston becomes more determined than ever to track down Nake Haskell.
Nate Haskell, the notorious "Dick & Jane" killer, resurfaces when he e-mails a disturbing video to the father of one of his brides, threatening to take her life.
It's the return of Melinda Clarke. This actress reprises her role of Lady Heather on this CSI episode.
A string of death takes over CSI this week. Has the team run across the cycle of homicide, a suicide, an accidental and a natural death all in one night?
An ex-cop is murdered in prison this week. The CSI team looks into the case and stumbles upon an interesting clue.
