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Promo of Gil Grissom's Last Episode on 'CSI: Crime Scene Investigation'

December 19, 2008 (9:37 am) GMT
William Pettersen will appear for the last time as forensic entomologist Gil Grissom in the January 15 episode of 'CSI: Crime Scene Investigation'.

The last episode of as Gil Grissom on "" will be aired on Thursday, January 15. In "One to Go", Grissom will officially leave the unit and the show will welcome 's Dr. Raymond Langston as its regular.

As seen on the preview of this last episode of Grissom, there will be a few flashbacks of his scenes starting from the year 2000. The crime drama series aired its pilot on October 6 that year and Grissom had a scene with novice agent Holly Gribbs (Chandra West). It was in the episode that Grissom is known to have an eye for insects.

Peterson's character will stun his co-workers with an announcement that his time as a CSI has come to an end after working with Dr. Raymond Langston on the "Dick & Jane" murders, aired December 11. Before leaving the team for good though, he offers Langston a permanent position on the CSI team.


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