CSI: NY's premiere on September 23 on CBS, which serves as a tribute to the 10-year anniversary of 9/11, reveals that he's been working with retired fire chief Joe Vincent. True to his word at the end of last season, Mac is taking some time off from the lab.

"Robert's character lost a son on 9/11, so Mac whose wife died on 9/11 and Joe have spent the last four months working on a project that is near and dear to both of their hearts," says exec producer Zachary Reiter, adding, "We wanted it to be simple and respectful, and I think we accomplished that."

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