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Criminal Minds: Unfinished Business

Gideon, Hotchner and their team reopen the unsolved case of a serial killer who has attacked someone for the first time in 20 years.

The serial killer resurfaces after 20 years of silence and contacts the Behavioral Analysis Unit with the promise that he will kill another victim in the next five days. As the team springs into action, Gideon enlists the help of a former colleague who worked the case when it was fresh to help find the killer.