If you need an intense local sheriff to help Gibbs & Co. work a case, you'd be hard-pressed to find a better fit for the meaty role than Lance Henriksen. Awesomely, that's precisely who NCIS has nabbed to guest-star on the hit series later this season, TVGuide.com has learned exclusively.

Specifically, the star of TV's Millenium and the guy also known to sci-fi enthusiasts as Alien's Bishop will play Sheriff Clay Boyd in the episode "South by Southwest," which is earmarked for a February sweeps showcase. In the outing, Gibbs is led to the Arizona desert when an NCIS agent turns up (gulp) dead.

http://www.tvguide.com/News/NCIS-Lance-Henriksen-1002063.aspx