After the break, Foreman exposits that Nick's heart is fine but his temperature keeps dropping. He'll die of hypothermia soon. Taub exposits that House isn't answering his phone. Hadley says they must have been wrong about the infection. Whatever is really wrong with Nick, it's still causing brain damage. I hope that doesn't mean that Nick had a ridiculously risky brain surgery for no reason. What a poor showing by House and the Cottages this week. No one has any idea what could really be wrong with Nick, so Foreman orders a full body scan even though House apparently hates those, except in all the episodes where he orders them. Taub doesn't want to do the scan either, saying it'll show a bunch of meaningless anomalies that everyone has floating around his body, and they'll waste a lot of time investigating them. It's better than nothing, though, so Popsicle Nick gets his scan.
A nervous Wilson waits to see his brother. Mercy's psych waiting room is pretty much the most depressing place ever, all dimly-lit and full of gross furniture. House gets Wilson a cup of coffee in an uncharacteristically considerate move. Then again, the last time he gave Wilson coffee, it was full of speed. Be careful, Wilson. Wilson says the last time he saw his brother was 13 years ago (when he mentioned the brother back in Season 1, he said he disappeared 9 years ago, so this works), when he happened to walk past a deli where Wilson was eating lunch. Apparently, it was a huge deli with all sorts of obstacles between Wilson's table and the door, because by the time Wilson made it outside, his brother was gone. This also explains why Wilson works at PPTH -- he knew his brother was in the Princeton area, and when House told him there was an opening at PPTH, he jumped at the chance to take it and continue looking for his brother. With that, House's phone comes alive with the sounds of his Hanson ringtone. He doesn't answer, saying the Cottages already texted him to say they were doing something stupid.
Sure enough, Nick's body is full of anomalies and the Cottages have to examine and rule out. Foreman spots what could be a vascular malformation in Nick's liver and says multiple AVMs causing problems with Nick's blood flow would explain all of his symptoms. The solution? They'll have to scan Nick's entire vascular system looking for malformations and fix them all, providing that he doesn't freeze to death first.