Steve Key

Casey tries to convince everyone he is healthy, Shay avoids the lawyer who wants to talk about Daryl's suicide, Otis and Katie grow closer, and Boden helps a woman with a negligent landlord.

Joan and Kitty try to prove that a string of murders is connected to an international government conspiracy involving the Defence Intelligence Agency, and Sherlock and Kitty's relationship is strained after she shares life-changing news.

The team investigate the rape of a woman in a coma. The trail leads them to a doctor whose stem cell research is funded by a billionaire with Parkinson's disease. They discover the tycoon is working in tandem with the medic to find a cure, but the pair's unethical procedures eventually come under scrutiny in court.

The record-breaking summer heat and the likelihood of blackouts send the Chicago Police Department into the streets in full force to temper the city's escalating violence. Alongside her new driver, Superintendent Teresa Colvin finds herself back in the field while Detectives Wysocki and Evers take over an emotional case in which a son witnessed his father's fatal shooting.