The cyber division takes down a Russian national; an openly gay agent struggles with the Orlando nightclub shooting; a radical approach to dealing with an ISIS supporter.

Squad C-19 chases the Cannibal Cop; agents in Crimes Against Children deal with the psychological impact of their cases.

After ISIS strikes in Paris and San Bernardino, the FBI in New York works to prevent an attack on the city during the holidays.

The organized crime division gears up for a takedown of the mob; the gang squad raids housing projects in Spanish Harlem after the death of a police officer.

After receiving intel, the FBI works to stop an attack on the subways; the JTTF meets with a former terrorist, while awaiting verdicts.

Special Agent Frank Pellegrino and his colleagues struggle with lessons learned in their 25-year fight against terrorism.