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— Doctor 2, "Code Yellow"
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Doctor 2[1][2] is one of the two "Doctor" incidentals from "Code Yellow," along with Doctor 1, who appears in the episode "Code Yellow." He would later appear in the episode "Student Driver Survivor."
Description[]

Concept art of Doctor 2 with Doctor 1
He is a short, stout green fish with an orange fin on his back. He wears clear, circular glasses and a white doctor's uniform along with teal pants and brown shoes. In the original storyboard of "Code Yellow," his head was bigger and more pear-shaped and he had freckles on his cheeks.
Role in series[]
"Code Yellow"[]
He and his friend, Doctor 1, see SpongeBob and immediately believe he is a doctor. He follows SpongeBob everywhere in the episode, watching his ways of solutions, after he had already told the patients it would not work out. He finds SpongeBob's treatments to be odd, but considers him prolific when they work out. He wants SpongeBob to give Squidward his nose job, believing he is a better doctor. Despite many failed attempts to do so, the doctors are still impressed that he finally succeeds. He is happy with the end result until SpongeBob tells them he is actually a fry cook and not a real doctor, and SpongeBob leaves. From the shock, Doctor 1 faints into Doctor 2's arms.
"Student Driver Survivor"[]

Mrs. Puff reveals herself disguising as Doctor 2.
Mrs. Puff disguises herself as Doctor 2 during SpongeBob's surgery.