House M.D. Season 1 Episode 8

Schoolboy Matt Davis collapses during an exam with serious poisoning symptoms. House supposes drugs or a 'substitute', arrogant mother Margo Davis won't consider either theory. Octogenarian Georgia Adams is brought in by her son with mental symptoms he can barely believe the cause of, actually 60 years old... It takes all House's cynicism to make Matt's mean bossy ma consent to therapy for an insecticide Matt presumably sprayed, but then Chi Ling is brought in with the same symptoms, no insecticide, their only contact was the school bus, even there every toxic trail runs dead. But both boys dressed for exams and college interviews...