A 39-year-old with Asperger's syndrome and obsessive-compulsive disorder, Edward Stanton lives alone on a rigid schedule in the Montana town where he grew up. His carefully constructed routine includes tracking his most common waking time (7:38 a.m.), refusing to start his therapy sessions even a minute before the appointed hour (10 a.m.), and watching one episode of the 1960s cop show Dragnet each night (10 p.m.). But when a single mother and her...