Andrew Manning

After a doctor is found dead at a golf course, the CBI team searches for a killer amongst a hospital's staff and patients. Meanwhile, when LaRoche is placed in charge of the CBI, his first act of business is to name Cho the new team leader.

After several of Bailey's patients die, she becomes the focus of a CDC investigation; Cristina teases Alex about his feelings for Jo; Owen continues to take care of Ethan while his parents remain in the hospital.

The team investigates a series of murders in Maryland where each of the victims had a large social media following.

Severide comes across a boy in need of help while out on a jog. Boden and McLeod clash over the future of the firehouse. Mouch and Greg Sullivan debate on Otis' podcast.

Daniel turns to the bottle for solace when he starts to distrust Emily and suspects that she and Jack are getting too close. Meanwhile, Declan's testimony in court marks the beginning of the end of his relationship with Charlotte.

Elizabeth, Russell and Mike B. must oust Craig Sterling from his role as national security adviser without creating a scandal; the person who hacked Air Force One is identified.