Henry is the clinic patient's older brother and babysitter in the episode Mob Rules who returns to the clinic 3 times within the episode. He was portrayed by A.J. Trauth.
Henry brings his infant brother to the clinic when he appears to have trouble breathing. House uses forceps to remove a small toy from his nose and tells Henry to keep a closer eye on him.
However, Henry and his brother are soon back. House removes another toy from the infant's nose, but Henry swears that he watched him like a hawk.
When Henry returns a third time, House starts to think that there might be something more wrong. He's noticed all the toys he removed are emergency workers of some kind. He grabs a powerful electromagnet and sticks it up the infant's nose. It latches on to a toy cat. House tells Henry that his brother is probably smarter that he seems.