Cold Case is an American police procedural television series which ran on CBS from September 28, 2003 to May 2, 2010. The series revolved around a fictionalized Philadelphia Police Department division that specializes in investigating cold cases.

A cold case is a crime or an accident that has not yet been fully solved and is not the subject of a recent criminal investigation, but for which new information could emerge from new witness testimony, re-examined archives, retained material evidence, as well as fresh activities of the suspect. New technical methods developed after the case can be used on the surviving evidence to re-analyze the causes, often with conclusive results.