Series regular
Petersen appeared in every episode of the original series' first eight seasons, with the exceptions of:
Season 5: "Hollywood Brass" Season 6: "Gum Drops", "The … See more

Anthony E. Zuiker, who created the show, loosely based Grissom on real life Las Vegas Metropolitan Police Department criminalist Daniel Holstein. Zuiker was "fascinated" by Holstein, who, like Grissom, kept maggots and pig's blood in his refrigerator. … See more

Early life
Grissom was born as an only child to a middle-class family in Santa Monica, California. Grissom's father taught botany at a local college and passed his enthusiasm for natural sciences onto his son. His father died … See more

This fictional character has an extensive fan base. There are more than one thousand videos made using the character on sites such as See more

Gil Grissom first appears in CSI: Crime Scene Investigation in the pilot episode. After this he appeared in almost every single episode of the show's first eight years, except in "Hollywood Brass", from season five, an episode that turns entirely around See more

Personality
Early episodes revealed Grissom to be a witty, enthusiastic, and quirky scientist who had some sense of humor. He flirted regularly and … See more

In the sixth-season episode "Bang-Bang", Grissom tells Doc Robbins, concerning a woman shot in the mouth, "This was someone who was emotionally close to her." Doc Robbins asks him if he has ever even been close to getting married. Grissom tells him … See more