Mac Taylor is going to have one more reason to lose sleep at night.

Craig T. Nelson will guest star for three episodes of CBS' "CSI: NY," according to The Hollywood Reporter.

In the guest arc, the Emmy winner will play Robert Parker, a successful NYC publishing mogul who also happens to be the nemesis to CSI leader and frequent insomniac Mac Taylor (Gary Sinise).

It's unclear from reports if the "nemesis" nature of their relationship is personal or business.

Nelson, 64, had a recurring role as Warden Jerry Hazelwood on "My Name Is Earl" last year. He won an Emmy for starring in the comedy "Coach." On the big screen, Nelson will next appear in the upcoming romantic comedy "The Proposal," costarring Sandra Bullock and Ryan Reynolds.