S3, E11: After a neighbor is stabbed, Dr. Choi (Brian Tee) enlists the help of April (Yaya DaCosta) to figure out who is the real cause of the incident. Dr. Bekker (Norma Kuhling) and Dr. Rhodes (Colin Donnell) expertise is put to the test when Noah (guest star Roland Buck III) misdiagnoses a patient. Dr. Charles (Oliver Platt) is put in an uncomfortable position when Dr. Reese's (Rachel DiPillo) estranged father (guest star Michel Gill) comes to him as a patient without her knowledge. Meanwhile, Dr. Manning (Torrey DeVitto) rushes to save a baby with whooping cough.