Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great series!

The FBI Files, which aired on the Discovery Channel, profiles cases from the POV of the FBI agents and local police who investigated them. It features interesting interviews, actual lab-work, dramatic action, and fascinating details of investigative procedure.Cases covered in this season 2 set include: a number of serial killers (Robert Hansen, Christopher Wilder, Joseph Christopher to name a few), the Miami shootout, the Dixie Mafia, and more.