Episode: 7×04 (Season 7 Episode #04)
Originally Aired: Nov. 15, 2007

Plot: Carla worries that she’s losing her Latin identity and fears that her daughter may never learn about her heritage. J.D. lands himself in hot water when the staff realizes that he uses nicknames because he doesn’t know anyone’s real name. Upon hearing this, the Janitor proposes a challenge — J.D. must identify everyone by name in the hospital, and if he can’t he has to be a janitor for a day.