“Blood Moon” – Detective Vartann (Alex Carter, left) and Catherine (Marg Helgenberger, right) take their relationship to the next level, on CSI: CRIME SCENE INVESTIGATION, Thursday, Oct. 7 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Photo: Sonja Flemming/CBS©2010 CBS Broadcasting Inc. All Rights Reserved.