If you have a big idea, this might be the week to make it public.

"Shark Tank." That one show that no matter who you are, you've seen it. Maybe you were in the waiting room of a doctor's office, or hanging at a nail salon on a Friday night.

Or you're one of the many new idea hopefuls who watch the show for inspiration. Whoever you are, you've seen it, and this week "Shark Tank" is coming to Chicago.

This morning at 9a.m., things got started at Studio Xfinity in Chicago. Open casting calls are being held until 6p.m. today and then there will be private auditions again tomorrow at the University of Chicago's Booth School of Business.

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