Martha comes to work the next morning to find the rest of the Cottages standing outside Danny's room while a team of FBI agents go over Danny's bed with a fine-toothed comb. Foreman explains that Danny left PPTH last night without checking out. Way to go, PPTH security! Just let a patient walk right on out of there without paying or signing any forms saying he is releasing himself against medical advice! Martha asks why the FBI cares about this, and Chase explains that they just showed up to reveal the STUNNING SHOCKER SURPRISE. When Danny's DNA went to that lab for testing, it was matched with a criminal database for some reason and popped up as a match with a man suspected of killing thirteen people in ten different states -- and then eating his victims. "And we saved him," Taub says. Well, technically, only House saved him. And PPTH security let a CANNIBAL SERIAL KILLER WHO DIDN'T PAY FOR HIS SERVICES WALK OUT UNDER THEIR NOSES. And just to make this more horrifying, remember how many bone fragments masses they found in Danny's intestines? Thirteen. How many victims is Danny tied to? Thirteen. Ewwwww. And now he knows that his meat-heavy diet is not just a compulsion -- it's also good for him, and he probably sees this is as a message from God that killing and eating people is the right thing for him to do. Oops!
Watch a preview of Thirteen's return to House in the show's 150th episode.