Henry's Baby Brother was the infant brother of Henry and a clinic patient in the Season 1 episode Mob Rules. Henry brings his baby brother into the clinic where Gregory House uses forceps to remove a toy policeman from his nostril. However, Henry brings the child back in again and once again House uses forceps and removes a toy fireman this time. Henry brings the infant back for a third time and House uses the forceps to remove an ambulance. Intrigued by this grouping, House grabs a powerful electromagnet and places it in Henry's nose. This time, he removes a miniature cat.