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While riding his scooter to the hospital, J.D. explains that he was the only one to apply for the position of "Chief Resident." He ends up becoming distracted and driving into a moving truck before heading to work. J.D. tells Turk about his morning moving furniture in the lunch line. The two join Molly, Elliot, Carla and Doug at a table and tension between Elliot and J.D. still is running high. Doug brags about repeating his residency and Elliot bores the table with her upcoming studies. Elliot and Molly are continually bonding and after one of her suggestions, Elliot decides to enter the running for Chief Resident.
Kelso presents Dr. Cox with a patient with a light bulb in his rear end. He explains that the patient's father donated "a wing, thigh and a breast" to the hospital and leaves. Elliot is working hard to prove her self to Dr. Cox as a viable candidate for Chief Resident and J.D. becomes worried when Cox tells him that Elliot is in the lead. J.D. asks him how he can get back on top and Dr. Cox pushes his light bulb patient off on J.D., who pushes it off to Doug, with hopes of impressing his mentor some other way.
Molly and Dr. Cox open dialogue and Molly asks him if she can follow him around and observe him for a paper on hospital conflict resolution that she has do to "earn her keep." Cox flat out rejects her inquiry saying that since doctors are here to work, conflict is at a minimum. Part was through his litany to Molly, he reads that a patient of his, Mr. Roman doesn't need to have surgery. Cox is pleasantly surprised because he never gets to give good news and rushes off to inform Mr. Roman. Molly takes note on Dr. Cox's behavior despite his feelings against it. In Mr. Roman's room, Dr. Cox comes to share with him the great news that he doesn't need surgery, except Turk has already beaten him to it. Cox vows to make him pay for "stealing his moment" and Molly continues her observations.
Elliot finishes her application for Chief Resident and excitedly tells Carla. She leaves to give it to Dr. Cox and Carla cheers her on. Laverne and Carla discuss that Elliot hasn't been listening to what Carla has to say, but instantly listens to Molly. Laverne leaves for Molly's office to discuss marital problems and Carla feels slighted that her friends are not coming to her for advice anymore. J.D. decides not to share with Elliot that Dr. Cox is still agitated from his run-in with Turk, which resulted in Elliot annoying him further.
Turk and Dr. Cox enter a patient's room to talk to him about surgery. Cox told Turk that the patient knows about the necessary surgery and Turk enters and talks about it in a casual way. The patient lashes out and Dr. Cox tells Turk "payback is a bitch." Afterward, Turk is visiting Carla at the nurse's station where he grabs one of Carla's homemade cookies. Molly walks by and suggests he address the situation rather than eating, which angers Carla further.
Elliot and J.D. find Dr. Cox outside at the entrance to the hospital at 3:00PM to hear his announcement of the new Chief Resident. Elliot is named for the position first, sending J.D. into a tailspin. After he breaks down to Dr. Cox, J.D. is informed that he and Elliot are Co-Chief Residents. Dr. Cox then leads them to the ridiculously small office that the two are to share and leaves after being paged.
Kelso is upset at Doug's assignment to the light bulb patient blames Dr. Cox and gives him the patient again. Before leaving, Kelso mentioned that a surgical consult is on the way. That surgeon ends up being Turk, leaving more conflict to build between the two. Molly talks to Carla about her study and Carla expresses little interest to what she has to say. J.D. and Elliot are working uncomfortably in their tiny office when the Janitor enters to clean. Molly is advising Elliot about J.D. in the office that they share and Molly continues to call him "Johnny." Molly give the sparing ex-couple two options: talk it out like adults or be petty like children. They opt for the "petty" method, splitting their interns into two resident teams.
Molly and Carla meet in the hallway again and Molly extends an offer to Carla to get something to eat. Carla sends her to Todd's where she says there is a barbeque that she is going to. Molly arrives and is unpleasantly surprised when she sees no barbeque and a naked Todd in a hot tub. Turk and Dr. Cox are throwing around ideas of how to remove the light bulb when Cox informs him that "every jackass in the joint" will be coming in to share their opinion. After kicking everyone in the room out who isn't an expert on light bulbs, the two are left with the Janitor. He appears to be knowledgeable about the bulb stuck in the patient and each doctor is desperately trying to have the Janitor on their side.
J.D. and Elliot appear to be functioning fine as a separated group with their residents and J.D. warns his group about fraternizing with Elliot's residents. Molly brings Todd into apologize to Carla for anything he said that might have been offensive and he explains that the cause for his actions are due to a warped relationship with his mother. Carla denies having qualms with Molly, despite being confronted about it. Molly inadvertently enters where Turk and Dr. Cox are working and is yelled at to leave. She gives her observations on how the two are functioning, saying that it is more of a competition now, not an argument. Dr. Cox apologizes and the Janitor enters their conversation. Together, the three formulate a plan to remove the light bulb using an angioplasty balloon. The light bulb patient's procedure was a success and the doctors (and Janitor) congratulate each other.
J.D. is checking on a patient and Elliot enters on the opposite side. The two spar and have a brief exchange of harsh words until a patient is in need of help. Together they work to save his life. Molly is unable to find her office, so she is working on a chair in the hallway when Turk comes to talk to her. He apologizes to Molly for Carla, saying that Carla likes to be the person that tells everybody else what to do. Molly leaves and Carla emerges from behind a corner to talk to Turk about what they planned for him to say. Dr. Cox interrupts, and leads him and the Janitor to the room where their patient is. The patient's father is congratulating Kelso for his "work" in removing the light bulb, hogging the glory.
Elliot and J.D. are brought together by the emergency with the patient and go for coffee. They reminisce about their beginning years at the hospital and resolve their conflict by remember why they were friends in the first place. Molly lets Carla give Laverne advice about her husband and Turk, the Janitor and Dr. Cox get their revenge on Kelso for stealing their moments by replacing the light bulb in his office with one they recently acquired.