CSI:。NY。(Crime。Scene。Investigation:。New。York)。is。an。American。police。procedural。television。series。that。ran。on。CBS。from。September。22,。2004。to。February。22,。2013,。for。a。total。of。nine。seasons。and。197。original。episodes.。The。show。follows。the。investigations。of。a。team。of。NYPD。forensic。scientists。and。police。officers。identified。as。"Crime。Scene。Investigators"。(instead。of。the。actual。title。of。"Crime。Scene。Unit。Forensic。Technicians"。(CSU))。as。they。unveil。the。circumstances。behind。mysterious。and。unusual。deaths,。as。well。as。other。crimes.。The。series。is。an。indirect。spin-off。from。the。veteran。series。CSI:。Crime。Scene。Investigation。and。a。direct。spin-off。from。CSI:。Miami,。during。an。episode。in。which。several。of。the。CSI:。NY。characters。made。their。first。appearances.。It。is。the。third。series。in。the。CSI。franchise.