Mark Valley is on his way to Sin City.
The veteran actor (Human Target, Fringe, Harry's Law) will appear on multiple episodes of CSI Season 15, according to Entertainment Weekly.
Look for him to come on board as an ex-detective who now works as a private investigator.
When Valley’s partner goes missing, he’ll team up with with Elisabeth Shue’s Finlay for the case, with the two getting along very well professionally AND personally... if you know what we mean.
CSI shifts to Sunday nights at 10 p.m. and premieres on September 28 this year, while CSI: Cyber (starring Patricia Arquette) is expected to debut in early 2015.