At Princeton-Plainsboro, House is reading an e-mail that Park's old boss - Mark Andrews - sent to the entire hospital, apologising for his conduct towards her and revealing that he has undergone sexual harassment training. But House does not believe that the apology is sincere and bets Park $100 that she will get fired at her upcoming disciplinary hearing.
Adams arrives at the hospital - late and in formal attire. She's been at a job interview, or so she claims. With Thad's vision restored to normal, House suspects that he is suffering from a neurological condition - known as Alice in Wonderland syndrome - which can be treated easily enough with medication.
But House still needs money to fund his department and blackmails Thad, reminding him that, in China, mental illness is taboo enough destroy a high-profile business deal. Rather than have his illness exposed to his new partners, Thad agrees to pay House a sizeable sum.
Thad's daughter Ainsley - second-in-command of the company - is worried about their stock, with shares falling amid news of Thad's illness. Thad starts vomiting blood, and while the team work on a new diagnosis, House tells Adams that she arrived at work too early to have been at a job interview - he knows that there is another explanation...
House presents Foreman with Thad's cheque, but Foreman tears it up - he knows that Thad's company has financial problems and so is aware that the donation was given "under duress".
Thad briefly experiences a new symptom - itching. His wife apparently died from Non-Hodgkin lymphoma, but Adams suspects that she may have been misdiagnosed - if the lymphoma was caused by virus, then Thad could have contracted the same infection during sex...
Thad begins to undergo radiation treatment, but begins to suffer from heart trouble. Meanwhile, House tries to scrounge money off Adams - he wants to buy stock in Thad's company, cure him and then reap the profits when business improves.
She offers her boss $5,000 - on the condition that he double his clinic hours and treat his patients more humanely - and a deal is struck.
Thad's condition worsens and he begins to develop lung problems, but House insists that the problem is in the patient's brain - though it's really just an excuse to make Park awkwardly converse with her old boss, neurology expert Mark Andrews.
Park diagnoses Thad with ADS - autonomic disregulation syndrome - and wants to do a tilt-table test to confirm. House orders her to treat for an alternative diagnosis suggested by Andrews, but Park is determined to run her test, convinced that House is testing her. She tells Adams, "I need to prove that I have the confidence to disobey him."
While Park prepares for her disciplinary hearing, Adams runs the tilt-table test, but it goes badly wrong and Thad falls into a coma. House interrupts Park's hearing, bursting into the room and threatening to fire her himself for disobeying him.
He's dragged out of the room by security, but afterwards admits to Adams that he agreed with Park's diagnosis, but wanted her to disobey him so she would run the right test and get fired, winning him his $100.
Adams is appalled, but House isn't bothered - he's come up with another diagnosis, Hepatic encephalopathy. The condition would mean that Thad's liver can't produce enzymes, so House orders Adams to perform a biopsy to confirm.
Meanwhile, shaken by House's outbursts, an emotional Park begs the hearing board not to fire her for striking Andrews...
Adams performs the biopsy, but Thad's daughter Ainsley is finding the strain of running the family business alone too much - she's worried about signing the documents that will finalise the relocation to China and cost employees their jobs...
There's good news and bad news for House's team - Park's appeal went well and she was not fired, but Thad's biopsy was clean, sending their medical mission back to square one.
But House has one final brainwave - he spots an x-ray of a metal plate, formed in a rough Y shape. "Start the patient on plasmapheresis," he orders Adams and Park. "He'll wake up in an hour."
Sure enough, Thad wakes - turns out he was suffering from Hyperviscosity Syndrome, a condition that made his blood thicken. Large, Y-shaped antibodies in Thad's system, there to deal with his rheumatoid arthritis, were clogging up blood vessels and causing his organs to shut down one by one.
With Thad recovered, House tells him to finalise the China move - he's eager for the company to recover so that he can make a profit. Ainsley has had second thoughts and tells her father that if he goes ahead with the move, it'll be without her. But Thad signs the documents regardless.
Wilson confronts House - he knows that his friend didn't really intend to sabotage Park's hearing. Instead, he wanted to make her emotional, so that the board would be won over - but House dismisses the suggestion.
Having successfully played the stock market, House presents Foreman with a cheque. "Call Chase and Taub - get them in here," he orders. "The boys are back!"
But the cheque is for significantly more than it would take to fund House's department. He calls Adams back to his office, having finally worked out why she was late that morning - she caught her boyfriend cheating and they had a big fight.
He's basing his theory on Adams pitching an STD diagnosis, her recent obsession with loyalty and her attempts to "look pretty" by dressing in nice clothes. Adams admits that House is close to the mark - she was previously married and has been separated from her husband for some time. That morning, she was at a lawyer's office finalising her divorce.
Now we discover why House gave Foreman the extra cash. He allows Adams to take out her frustration about her marital status - with a baseball bat. House watches with glee as his new employee destroys his office...
• 'Risky Business' is a pretty standard episode of House - maybe it's the one week gap between this episode and the last, but we were already kind of bored by the storylines involving Park's hearing and Adams' hiring.
• And how odd were those final scenes? Odette Annable smashing a skeleton with a baseball bat in slow-motion - not your average conclusion to a House episode.
• But next week, Chase (Jesse Spencer) is back, which is something to look forward to! The return of the dreary Taub (Peter Jacobson) - less so.
• The size of Wilson's role in House has always fluctuated, but his appearance is far too brief this week. Just two short scenes, and only one involving his classic banter with House. More Robert Sean Leonard, please!
• 37 Minutes - 'Fraid not. This week, House jumps the gun and has his eureka moment - spotting the Y-shaped plate in the x-ray - around 35 minutes in. Darn!