Mr. O'Neil was a patient at Sacred Heart Hospital.
When Janitor was plotting new ways to "get" J.D., Mr. O'Neil told him that he was too busy trying to get his own "J.D.", a Juris Doctorate, to live his own life. Janitor then pondered if he had wasted his life. ("My Mirror Image")
- Mr. O'Neil's name is a reference to Neil Flynn's name.
- Mr. O'Neil has punched a whale in the face. ("My Mirror Image")
|SEASON SIX PATIENTS|
Betty • Mr. Chung • Brian Dancer • Carla Espinosa • Mr. Fulton • Mr. Frances' son •