Tommy Schrider

Diane settles in as a new partner at Reddick, Boseman and Kolstad. Maia deals with fallout from the financial scandal, but picks up a new case with Lucca.

The police call in Holmes and Watson to consult on a homicide heard by a cutting-edge gunshot detection system when they can't find any tangible evidence that a crime was committed.

As Reese and Finch try to save a hotel maid's life, they encounter a litany of suspects and Detective Carter considers a significant offer from the FBI.

Elizabeth discovers an assassination plot against the Iranian president, while dealing with a massive protest against Iran's plan to execute a gay citizen; in order to deal with her PTSD, Elizabeth sees a therapist.

Robin, an old flame of Don's, returns to prosecute an incarcerated criminal, but when three witnesses involved in the case are murdered, Don and the team fear she will be the next victim.