CSI: NY is an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 police procedural

Police procedural

The police procedural is a subgenre of detective fiction which attempts to convincingly depict the activities of a police force as they investigate crimes. While traditional detective novels usually concentrate on a single crime, police procedurals frequently depict investigations into several...

 television series that premiered on September 22, 2004, on CBS

CBS

CBS Broadcasting Inc. is a major US commercial broadcasting television network, which started as a radio network. The name is derived from the initials of the network's former name, Columbia Broadcasting System. The network is sometimes referred to as the "Eye Network" in reference to the shape of...

. The show follows the investigations of a team of NYPD

New York City Police Department

The New York City Police Department , established in 1845, is currently the largest municipal police force in the United States, with primary responsibilities in law enforcement and investigation within the five boroughs of New York City...

 forensic scientists and police officers as they unveil the circumstances behind mysterious and unusual deaths as well as other crimes. The series was the second indirect spin-off from the veteran series CSI: Crime Scene Investigation

CSI: Crime Scene Investigation

CSI: Crime Scene Investigation is an American crime drama television series, which premiered on CBS on October 6, 2000. The show was created by Anthony E. Zuiker and produced by Jerry Bruckheimer...

 and directly from CSI: Miami

CSI: Miami

CSI: Miami is an American police procedural television series, which premiered on September 23, 2002 on CBS. The series is a spin-off of CSI: Crime Scene Investigation....

 during an episode in which several of the CSI: NY characters made their first appearance.