The BAU team goes head-to-head with a serial killer (Keith Carradine) who has tortured and killed more than 100 people over 30 years.
After years of hiding, a dangerous man from Fiona's past resurfaces in Miami with deadly intentions; Michael teams up with Fiona's ruthless brother to do whatever it takes to save her.
Michael, Sam and Fiona help a boy whose family is being terrorized by his abusive stepfather; Michael's new contact returns with an interesting proposition to help Michael get back into the intelligence community.
A paranoid mathematician enlists Michael's help to stop the vice president of a defense firm from selling company secrets; Michael tracks down a new contact in the intelligence community.
Barry enlists Michael's help in tracking down his money-laundering client list, which has been stolen; Fiona disagrees with Michael's attempts to reconnect with the intelligence community.