A doctor connected to Voight is investigated after four patients with chemo overdoses are sent to Chicago Med; Platt and Burgess work to clear Roman's name.
When Mycroft returns to New York, his motivations cause problems between Joan and Sherlock; an investigation brings Sherlock and Watson to the world of unmanned aeronautics.
New York proves itself both a jewel box and a fish tank of romance as Charles, Mabel and Oliver take their relationships to the next stage; dating can reveal many hidden secrets.
After a single mom is arrested for leaving her young daughter alone for days, Sgt. Benson suspects the woman may have been abused in her own childhood.
As he awaits his formal arraignment at Rikers Island, Naz realizes that his survival, or perhaps his demise, rests in the hands of a particular inmate.