Take a look back at some of the more memorable casting changes in the history of television.
William Petersen portrayed Dr. Gil Grissom on "CSI" from the time it launched in 2000 through the show's ninth season, when he left to focus on stage acting.
Seoul National University/Handout/Reuters
Lucy Richardson/ Reuters
It's easy to upload your photos and/or videos on News8000.com. Once you do, we'll share your upload with the community!