6x18 - Little House on the Prairie

Albert experiments with smoking in the basement of the School For the Blind and, when shooed out of the basement, hides the still-lit pipe in some cloths. The pipes ignite and result in a late-night fire that kills Alice Garvey and Mary's baby son. As a result, several people struggle with the consequences: Albert becomes completely withdrawn when he learns his careless actions may have caused the fire, Mary in deep shock and Jonathan Garvey in an alcohol-induced state of denial.