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

Two very different people are desperate for a diagnosis to their unexplained paralysis: textbook "good patient" Joe, 61, and more skeptical Ann, 44.

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

Matt, 20, experiences fainting spells that stop his heart, each one preceded by a sense of déjà vu. But is the issue with his heart -- or his head?

The once-athletic Angel, 23, suffers from episodes of muscle pain so severe she often can't move. As she begins a nursing career, she needs answers.

The parents of bright and charming, Sadie, 7, seek alternatives to the devastating brain procedure doctors propose to treat her frequent seizures.

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