

Cases were also spread out over much of the previous century, with some as recent as a year or two old and others dating back to the 1910s. All cases involved murders committed in Philadelphia, although investigations occasionally required travel outside the city.

Usually, each episode would focus on a single investigation. They work under Lieutenant John Stillman ( John Finn) and are assisted by other detectives from their squad-Nick Vera ( Jeremy Ratchford), Will Jeffries ( Thom Barry), and beginning in season three, Kat Miller ( Tracie Thoms). Rush was initially partnered with Detective Chris Lassing ( Justin Chambers) in the first five episodes and then with Detective Scotty Valens ( Danny Pino) for the remainder of the series. The show is set in Philadelphia, Pennsylvania, and follows Detective Lilly Rush ( Kathryn Morris), a homicide detective with the Philadelphia Police Department, who specializes in "cold cases", or investigations which are no longer being actively pursued by the department.
