J.D. distracts the Janitor and Troy the Cafeteria Guy with a riddle. Dr. Cox and Dr. Jeffrey Steadman compete for the residency director position. Carla gets to work with Turk when she covers for one of the surgical nurses; Turk is annoyed at first but then appreciative when Dr. Wen says it was as though he had a lucky charm in the room with him. Sean's and Elliot's relationship hits rocky ground; J.D. seizes the opportunity to admit his feelings for her.