Day by day, Willie, 46, loses pieces of himself. He has memory loss, seizures, mood swings, a brain lesion -- but no diagnosis. Can the crowd help him?

Six-year-old Kamiyah will suddenly and briefly go limp dozens -- sometimes hundreds -- of times a day. Now the search is on to find others like her.

Lashay, 17, can't hold down anything she eats or drinks. But negative interactions with previous doctors leave her family leery of the crowd's advice.