Hundreds of thousands of Americans have schizoaffective disorder, an overlap of schizophrenia and manic depression. The illness can cause them to have both mood swings and cognitive symptoms including mania, depression and visual or aural hallucinations, and can be at grave risk of suicide.This week on The Infinite Mind, we explore schizoaffective disorder, what it's like to have the illness, how people have persevered in spite of it, and why it leaves so many doctors confused.Dr. Fred Goodwin's guests include Dr. Nassir Ghaemi, assistant professor of psychiatry at Harvard Medical School, Dr. Eden Evins, of the Massachusetts General Hospital Schizophrenia Program, and Dr. Corinne Cather, a cognitive behavioral therapist and clinical fellow at Massachusetts General Hospital.We'll also hear a gripping account of what it's like to live with schizoaffective disorder and hear a musical performance of Philippe Gaubert's "Nocturne et Allegro Scherzando" from Tracy Harris, a professional flutist living with the disorder, and a remarkable recreation of what it's like to hear aural hallucinations as recreated by a leading Broadway sound designer, based on the descriptions of a young woman who is living with the illness. John and Katie Cadigan discuss their new documentary film, "People Say I'm Crazy," which chronicles John's diagnosis with schizoaffective disorder. And John Hockenberry looks at the steep rise in the number of suicides on military bases, and what the resulting government response can teach the rest of us about the need for access to mental health care.