Suffering from double vision and horrible nightmares, 16-year-old Dan (Scott Mechlowitz) traces the source of his problem to injuries sustained during a Lacrosse match. As usual, Dr. House (Hugh Laurie) has other ideas, first diagnosing Dan with MS, and then declaring that the boy is being sexually abused. By the time House has figured out the real reason (maybe!) and has scheduled Dan for brain surgery, the boy disappears from the clinic--and the chase is on. Elsewhere, House is annoyed by a ditzy mom (Kylee Cochran) who refuses to let her baby be vaccinated, and by a patient (Alex Skuby) with an ugly abscess in his knee who is threatening to sue everyone within earshot. ~ Hal Erickson, Rovi