Inside the Mystery of ‘Black Box'

Kelly Reilly talks about her role on the upcoming ABC medical drama.
2:10 | 04/23/14

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Transcript for Inside the Mystery of ‘Black Box'
And we're going inside to social square now because Kelly Riley, the star of "Black box," a new medical thriller on ABC here. Welcome to "Gma." On the new show, Katherine black, a neurologist. You study the brain. You figure out the brain. But you have a little secret of your own. She does. She's a wonderful brilliant neurologist. But she has something in common with her patients. She has her own personal disorder. She's bipolar. It's the most treatable form of mental illness. And staying on the medication is the problem. When she does, it's a little bit of a rollercoaster ride. The show attacks that. But so much more. It's not just about one mental illness. Not at all. We really explore a lot of fascinating and bizarre and frightening medical cases, neurological medical cases. She has to figure out, help these patients that we need to know and get inside their head how to live with it. Neurological cases aren't always fixable. It's fascinating how one can live with it. So many people excited about this. We want to go to the social slot machine. I'm going to get an idea of what people are wondering out there. Here we go. We asked them to ask you. What research did you do for the show and your character? I did more than I've ever done for any character. I did some four or five months prep. Just speaking to -- when you're dealing with something so important as mental illness and bipolar, you start to peel away the onions and the layers. There's so much I didn't know about it. And so, I spoke to many people who suffer with the disorder. And neurologists, et cetera. I really spoke to a lot of people. And read a lot of books. Kelly Reilly. Thank you so much for being here. Watch the series premiere of "Black box" tomorrow at 10:00, 9:00 central, here on ABC. And to see a clip, go to our website, goodmorningamerica.com on Yahoo! Coming up, we've got much

This transcript has been automatically generated and may not be 100% accurate.

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