|"Folie à Deux"|
|Season 3, Episode 11|
|Air date||March 6, 2018|
|Written by||Diane Frolov & Andrew Schneider|
|Directed by||David Rodriguez|
"Down By Law"
"Born This Way"
After a neighbor is stabbed, Dr. Choi enlists the help of April to figure out who is the real cause of the incident. Dr. Bekker and Dr. Rhodes expertise is put to the test when Noah misdiagnoses a patient. Dr. Charles is put in an uncomfortable position when Dr. Reese's estranged father comes to him as a patient without her knowledge. Meanwhile, Dr. Manning rushes to save a baby with whooping cough.
- Brian Tee as Dr. Ethan Choi
- Colin Donnell as Dr. Connor Rhodes
- Marlyne Barrett as Maggie Lockwood
- Nick Gehlfuss as Dr. Will Halstead
- Norma Kuhling as Dr. Ava Bekker
- Oliver Platt as Dr. Daniel Charles
- Rachel DiPillo as Dr. Sarah Reese
- S. Epatha Merkerson as Sharon Goodwin
- Torrey DeVitto as Dr. Natalie Manning
- Yaya DaCosta as Nurse April Sexton