Cameron does some kind of ultrasound on Doug's carotid artery, and he does not get all pissy about the electricity she's using to try to save his life. Instead, he hiccups, noting that he's been getting the hiccups fairly often in the past week. Cameron takes note of this, unlike all the other doctors Doug saw who told him the hiccups weren't related to his balance problem. The doctor Cameron owes a favor to is a moron.
Cameron rushes past Chase to make a note of Doug's pathological and possibly serious hiccupping problem. Chase doesn't care about Doug or his hiccups and asks why Cameron is apparently skipping out on the vacation he planned to treat another doctor's patient for hiccups. Yeah, that does look bad. Cameron says she does have a reason for needing to stay with this particular case, but she can't tell Chase what that reason is. Chase says this means that Cameron lied to him in the first place, only to ask him to trust her when she gets busted. "Yes," Cameron says, looking guilty as hell. "Okay," Chase says. Sucker.
Cameron walks with House down the hallway and updates him on Doug, just like the good old days. His carotid artery is fine, but he has the hiccups. House says he is now interested enough in the case for Cameron to leave it with him and go on her vacation, then wonders if the fact that she's all up in this case and doing the tests he told her to do without complaint means she's still in love with him. Let us all hope not, for that storyline is very much played out. Cameron doesn't deny it, just says that she cares about Doug as well as the Cottages, who have been through a lot with Kumar's death. House calls bullshit on that, since she would have been caring and concerned back when the death actually happened, not a week later. He says the only explanation for why she's here now doesn't actually make sense, so he's not going to elaborate on it.
Cameron breezes past House and into the meeting room, where she tells the kids about Doug's latest symptom of hiccups. Hadley suggests a brain problem, but House says Cameron already did a CT of Doug's head and it was "as empty as [Cameron's] boyfriend's calendar." If Doug's head is empty, that sounds like bad news, but I guess House only said that to needle Cameron. Nosy Taub asks what Doug's case has to do with Chase. House says he doesn't know, but it must be something and Cameron deflects nicely by coming up with a new diagnosis of organophosphate poisoning from exposure to all the nurseries Doug has picketed. Foreman turns that down only for Taub to come up with MS based on the fact that Doug has a Scandinavian last name and apparently Scandinavians are slightly more likely to get MS. That's pretty weak, but House orders Cameron to do a lumbar puncture to confirm it while the real Cottages get restless with all the inactivity and Cameron wonders how to do an LP on a guy with the hiccups. I'm gonna go with very carefully.