SHARK TANK - "Episode 313" - The inventor of Rollerblades hopes to get investment money to put toward his newest invention, an elevated mono-rail bike system. An amazing story from a Rochester, NY businesswoman who hopes her dream comes true and strikes a deal for her innovative shoe accessories that can turn any shoe into a boot. A man from Buena Park, CA must convince the Sharks that there is a market for a custom made air mattress that fits in the back of a pickup truck; and a fashion designer from Dallas, TX has over a billion reasons the Sharks should see the value in his customized cruiser bikes that can be designed on an interactive website. There is a follow-up on Ladera Ranch, California's Shelly Ehler and her ShowNo, a unique towel design that provides coverage when changing out of a swimsuit in public places, which Lori Greiner invested in during Season 3, on "Shark Tank," FRIDAY, MAY 4 (8:00-9:01 p.m., ET) on the ABC Television Network. (ABC/RICHARD CARTWRIGHT) MARK CUBAN, DAYMOND JOHN, KEVIN O'LEARY, BARBARA CORCORAN, ROBERT HERJAVEC, MELANIE PEDDLE AND TIFFANY BROWN (LOOK AT ME DESIGNS)