On Friday’s episode of ABC’s Shark Tank , the hit show’s investors – Mark Cuban, Daymon John, Kevin “Mr. Wonderful” O’Leary, Barbara Corcoran, and Robert Herjavek – cross a major milestone: the 100 millionth dollar invested in entrepreneurs’ ideas since the show began. Following the episode, a special installment of 20/20 will highlight the show’s success, and also feature exclusive interviews with the sharks, and follow-ups about the reality show’s biggest deals.