BARBARA CORCORAN AND LORI GREINER GO HEAD TO HEAD FOR THE FIRST TIME EVER, ON ABC'S "SHARK TANK"

"Episode 504" -- Barbara Corcoran and Lori Greiner will go head to head for the first time ever on "Shark Tank." Pitches include two guys from Dallas, TX hope to bring a little sweetness to the masses with their savory cake balls. Two doctors who are also brothers from Tucson, AZ, claim they have a social media cure for the old-school communication between patients and medical professionals. Two sisters-in-law from Firecrest, WA pitch their business for gourmet pickles made from a 100-year-old family recipe, and a tech-savvy entrepreneur from Los Angeles, CA has a mobile app that allows a modern way to send a traditional postcard. Also, an update on Tracy Noonan and Danielle Desroches from Cohasset, MA and their Wicked Good Cupcakes business, which Kevin O'Leary invested in during Season 4, on "Shark Tank," FRIDAY, DECEMBER 20 (9:00-10:01 p.m., ET) on the ABC Television Network. (Rebroadcast. OAD: 9/20/13)

The Sharks in this episode of "Shark Tank" are Barbara Corcoran, Mark Cuban, Lori Greiner, 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.