More than 24 million people tuned in to watch character Gil Grissom leave the long-running U.S. crime drama series "CSI," CBS announced Friday. Dr. Gilbert "Gil" Grissom, (Ph.D.) is a fictional ...

This is because William Petersen, who played Gil Grissom in CSI, exited the show in season 9. As such, not only did Crime Scene Investigation become in need of a new character to fulfill the role ...

William Louis Petersen is an American actor and producer, best known for playing Dr. Gilbert "Gil" Grissom on the hit CBS series CSI: Crime Scene Investigation, Richard Chance in the film To Live ...