AN ENTREPRENEUR GETS A TONGUE-LASHING FROM MARK CUBAN, AND A MOM IS BROUGHT TO TEARS BY THE SHARKS' RECEPTION TO HER PRODUCT

WHO IS THE ONLY ENTREPRENEUR THAT THE SHARKS CAN AGREE IS THE "REAL DEAL?" FIND OUT ON "SHARK TANK" MARCH 7

"Episode 521" - A mechanical engineer from San Francisco hopes to catch a deal with his patented bike lighting LED system that attaches to the wheel rim for safety and utility but incurs the wrath of Mark Cuban along the way. Parents from Los Angeles tout their baby wear with reinforced knees and built-in squeakers to help caregivers keep track of a crawling baby on the move. The Sharks' reaction brings the mom to tears. An entrepreneur from La Grange, IL thinks his shoe buffing pad that attaches to a household power drill could revolutionize shoe shining, and a Rochester, NY inventor wants the Sharks to invest in his "modular laces" which enable kids and adults to customize their sneaker looks with different styles and colors. Who among these do the Sharks agree is the "real deal?" We follow up on Kazam, a pedal-less training bike by a Virginia Beach entrepreneur in which Mark Cuban invested last season on "Shark Tank," FRIDAY, MARCH 7 (9:00-10:01 p.m., ET) on the ABC Television Network.

The Sharks in this episode of "Shark Tank" are Mark Cuban, Lori Greiner, Daymond John, Robert Herjavec and Kevin O'Leary.

Mark Burnett, Clay Newbill and Phil Gurin are the executive producers of "Shark Tank," which is based on the Japanese "Dragons' Den" format created by Nippon Television Network Corporation. The series is produced by Sony Pictures Television.

"Shark Tank" is broadcast in 720 Progressive (720P), ABC's selected HDTV format with stereo sound. This program carries a TV-PG parental guideline.

For more information on "Shark Tank," visit ABC.com.