When a beautiful young woman is murdered, Holmes and Watson investigate her ties to a billionaire CEO. Meanwhile, Mycroft makes a case for Sherlock to move back to London.

The team investigates a Columbine-like threat at a private school. Atwater seeks out a mentor; Olinsky’s marriage faces a crisis.

Danny investigates when a doorman at a nightclub is murdered; Frank makes a decision about a former partner’s future.