Detective Holloway testifies in court as part of an undercover operation, leaving Severide to watch her young son; a fire at an art gallery with a victim trapped inside leads Cruz to make a rash decision.
A Square Peg In A Round Hole. Marcel helps Blake replace a patient's liver. Taylor tries to prove herself. Will continues to pursue the truth about Cooper. Ethan gets closer to returning to life in the ED.
The NCIS team investigates when a Navy drone pilot is murdered after using a black market drone to obtain military surveillance.