The team investigate when a famous rapper and two fans are killed. Meanwhile, Isobel hits a major milestone that has her contemplating her future at the Bureau.
After two women are brutally murdered Maggie and OA get info that leads them to a dating website where scorned users are targeting women who rejected them.
After a young girl goes missing, the team discovers the kidnappers used her to carry out a major heist, sending them on a hunt for the dangerous culprits.
When a CEO is killed by a targeted explosion inside his penthouse, the team must work to figure out how someone accessed the highly secure building; Maggie pumps the brakes on her personal life.
When two IRS special agents are stabbed to death in Brooklyn, the team is thrown into an investigation that leads back to the resurgence of the online conspiracy community of Duke Ducoyle, their suspect from a previous case.