Recurring nightmares force Maggie to face a life-altering trauma from her past; Gary seeks help from an unexpected someone in order to make one final attempt at convincing Maggie to get treatment.
Cooper and the Red Cell team try to stop a killer who disfigures his victims' faces.
Regina discovers she might not know Rome like she thought she did; Gary tries to convince Maggie that he will be there for her; Katherine discovers she has a new admirer.
Shocking information threatens Jack Dayton's surgery and the future of OR 2.0; Archer goes rogue to save a patient in need; Maggie questions her future at Med.
When a deep-sea diver is murdered on the job, his body and suspected co-workers must remain in a high-tech decompression chamber for four days, leaving the NCIS team to complete an unorthodox investigation from outside the tank.