Episode 48 of "House"
s03e02 Cane & Able

Houses ego has taken quite a blow because he failed to diagnose his last case, and its affecting him physically. He is obviously in pain again, although he continues to deny it. Houses new case is 7-year-old Clancy, a product of in-vitro fertilization, whos been admitted to the hospital with rectal bleeding and proclamations of being tortured by aliens. As the team runs tests on him, they discover the same test is giving conflicting results. When Clancy claims to have a tracking device in the back of his neck and the team discovers an unknown metal object exactly in that spot, they arent quite sure what to think. Amidst all this weirdness, Cuddy and Wilson decide it would be best not to tell House the truth about his last case, thinking that perhaps he will learn some humility if he believes hes not always right. Cameron discovers the lie and is outraged, but Cuddy convinces her to hold off telling House. When House and the team discover cells with a different type of DNA in Clancys body, they are forced to give Clancys alien claims a little more credence, but a frustrated House gives up on his young patient, forcing Cuddy to re-think her desire to hold back the truth shes hiding.