House wants an exercise test, which will hopefully cause another attack. Chase is the first one to figure this out, and he gets a congratulatory hug.

Bob buckles under the rigorous interrogation Adams and Chase give him, and admits that he was not sitting at his desk when the attack hit. He admits that he felt light-headed before the attack and could barely breathe. Then his wife enters before he can go into any detail. She doesn't understand why they'd do an exercise test when he wasn't exercising the first time. Chase doesn't really answer and lets Bob stammer.

House pounds on Wilson's door to tell him that Chase and Taub are back. Wilson has a headache and wants less noise. He claims to have a migraine, but House is convinced that Taub's babies are hidden in his office somewhere. And he's technically wrong, because Wilson has stashed them just outside the window.

Exercise test. Chase says they need to get Bob to the point he was at when he had the attack. Adams declines to have sex with him. Monitoring the situation, Park tells Taub that it seems reckless to deliberately cause attacks. Then House brings in the two little Taubettes because he wants to get a DNA sample from Taub and find out the parentage of the children once and for all. I think I'm right in saying that no one cares about this subplot. Taub's children, and indeed his entire personal life, are of no interest to me whatsoever.

Mrs. Bob comes in because Chase and Adams are trying to get Bob to spill the beans about his "flag football." He starts to stammer, and then collapses off the treadmill. Taub, who has been dutifully watching the monitors, reports that it wasn't his heart. Chase: "I know. It was a seizure."

House's vacant external office. Chase and Taub sit on the floor while Park and Adams carry in a couch. They're also running down things it might not be. Chase tosses out myocarditis. Taub suggests something genetic. House pretends he likes the idea, but it's because he wants to hug Taub and steal his hair. Park and Adams sit on the couch until House invents a new place for it. Which is too bad, because I liked the idea that they got to sit on the couch while Chase and Taub were on the floor. You want something to sit on? Go steal a chair! But instead, House stretches out on the couch as soon as it's free, leaving his four minions seatless. Park's got an idea that House considers boring, so he replaces it with photic epilepsy.