On Shark Tank, a group of wealthy investors like Mark Cuban and “Queen of QVC” Lori Greiner listen to pitches from people who have invented something. Might be an app, might be a toy, might be a belt that can hold a beer can. Then the investors decide whether to invest in the business, and they negotiate with the entrepreneur — sometimes competing with each other to get the deal. In this encore episode, we revisit our conversation about the hit ABC show.