Nikiya Mathis

Sherlock pursues Martin Ennis, an unpredictable criminal, before he strikes again. During the investigation, Sherlock is forced to work alongside Kathryn Drummond, the FBI profiler who literally wrote the book on Ennis.

Elizabeth makes a secret trip to Iran in hope of preventing a coup that could impact President Dalton's administration; Elizabeth's staff are brought up to speed on the investigation into Marsh's death.

Danny picks up a bodyguard job on the side, working for an ex-con who took the fall for someone else. Eddie and Jamie reflect on their relationship, while Gormley's wife makes a request.

Awaiting arraignment at Rikers Island, a nervous Naz considers the extent to which his survival relies upon another inmate.

Finch tries to protect a 911 operator by going undercover in an emergency call centre; the threat proves to be larger than anticipated.

When an inmate comes in with an entirely preventable illness, Max, Sharpe and Iggy head directly to the source: Rikers Island; Bloom struggles with her recovery; Reynolds gets news that could change his life.