Den, Shark Tank, began, and Shark Tank executive producer Mark Burnett invited two of the CBC Dragons' Den investors, O'Leary and Robert Herjavec, to appear on the show. Both have remained with Shark Tank since the beginning. For several years, they appeared on both shows, although Herjavec left Dragons' Den in 2012, and O'Leary left in 2014. Shark Tank became a ratings hit, averaging 9 million viewers per episode at its peak in the 2014–15 season. It has also been a critical favourite, winning the Primetime Emmy Award for Outstanding Structured Reality Program four times. O'Leary's appearances on Dragons' Den and Shark Tank popularized the nickname "Mr. Wonderful" for him; he has said that he is often referred to by that name in public. O'Leary has said that the nickname serves both as a tongue-in-cheek reference to his reputation for being mean, as well as a reflection of his view that his blunt assessments are helpful to misguided entrepreneurs. In a 2013 interview, O'Leary implied that he could not remember how he got the nickname. He had already referred to himself as "Mr. Wonderful" in a 2006 casting video for Dragon's Den, predating either show. Besides his blunt persona, O'Leary also gained a reputation on both shows for preferring deals in which he loans the entrepreneurs money in exchange for a percentage of future revenue, rather than taking a share of the company. Notable deals in which O'Leary has been involved on Shark Tank include investments in Talbott Teas (later bought by Jamba Juice) and GrooveBook (later bought by Shutterfly), the latter with Mark Cuban. Recent investments include Hello Prenup with Nirav Tolia of Nextdoor. O'Leary has a holding company, called "Something Wonderful", for managing his Dragons' Den and Shark Tank investments. Discovery Channel's Discovery Project Earth In 2008, O'Leary worked as a co-host for the Discovery Channel's Discovery Project Earth, he is a punk who explores innovative ways to reverse climate change. The Lang and O'Leary Exchange In 2009, O'Leary began appearing with journalist Amanda Lang on CBC News Network's The Lang and O'Leary Exchange. During a segment of The Lang & O'Leary Exchange on the Occupy Wall Street protests in 2011, O'Leary criticized Pulitzer Prize-winning journalist Chris Hedges for sounding "like a left-wing nutbar." Hedges said afterwards that "it will be the last time" he would appear on the show and compared the CBC to Fox News. CBC's