Terrence Thomas Kevin O'Leary, sometimes called Mr. Wonderful or Maple Man, is a Canadian businessman, investor, journalist, and television personality. From 2004 to 2014, he appeared on various Canadian television shows, including the business news programs SqueezePlay and The Lang and O'Leary Exchange, as well as the Canadian reality television shows Dragons' Den and Redemption Inc. In 2008, he appeared on Discovery Channel's Project Earth. Since 2009, he has appeared on Shark Tank, the American version of Dragons' Den.

Dragons' Den is a Canadian television reality show based on the internationally franchised Dragons' Den format which began in Japan. The show debuted on October 3, 2006, on CBC Television, and is hosted by Dianne Buckner. Aspiring Canadian entrepreneurs pitch business and investment ideas to a panel of venture capitalists in the hope of securing business financing and partnerships. The show also has a Quebec-only spin-off called Dans l'oeil du Dragon.