9x10: One To Go (Full Episode, Megavideo) 

The CSI team is shocked and saddened when, after working with Dr. Raymond Langston (Fishburne) on the "Dick & Jane" murders, Grissom announces that his time as a CSI has come to an end and offers Langston a permanent position on the CSI team.
trefwoorden: csi, season 9, episode 10, full episode, megavideo, one to go