TV's biggest casting changes

Published On: Jun 09 2011 01:17:17 PM PDT   Updated On: Apr 15 2014 11:00:00 PM PDT

Take a look back at some of the more memorable casting changes in the history of television.

William Petersen, CSI
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CBS TV Studios

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.


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