Stella is forced to deal with painful memories when Det. Valens visits the lab and says her DNA is connected to a Philadelphia cold case making her a suspect, and Mac's career is put in jeopardy when an internal investigation is opened against him, on CSI: NY, Wednesday, May 2 (10:00-11:00 PM, ET/PT) on CBS.

Danny Pino (Cold Case) guest stars as Det. Scotty Valens; Mykelti Williamson guest stars as Chief of Detectives Brigham Sinclair who leads an investigation against Mac Taylor, and Joey Lawrence also guest stars.