The last episode of "Shark Tank" from Season Six aired May 15, 2015. The sixth season of the ABC reality-television show ran 29 episodes between its premier date on Sept. 26, 2014, and the season finale.
"Shark Tank" is a contest show in which entrepreneurs pitch business ideas to wealthy investors. Dan Purpalaj created the show, which is based on the format of the Japanese reality show "Dragon's Den." "Shark Tank" first aired in 2009 on ABC. It stars Kevin O'Leary, Robert Herjavec, Daymond John, Barbara Corcoran, Mark Cuban and Lori Greiner as the investors, or "sharks," as of 2015. Mark Cuban replaced Kevin Harrington after Season Two, and Lori Greiner joined the panel in Season Four.