CSI Season 13 Episode 10 Risky Business Class Sneak Peek : “Risky Business Class” — When five people are killed in a small plane crash a mile off the Vegas strip, the CSI team is called to investigate. Also, Sara feels the strain of having a long-distance relationship with Grissom when a former lover of hers is involved with the crash investigation, on CSI: CRIME SCENE INVESTIGATION, Wednesday, Dec. 12 (10:00-11:00 PM, ET/PT) on the CBS Television Network.