“Only in the Florida Keys," a 30-minute television special that explores one-of-a-kind experiences, places and elements found only in the island chain, is to debut on the Discovery Channel Saturday, March 19, at 8 a.m. EDT. Hosted by Christina Wilson, a Florida Keys resident and travel adventurer, the program takes viewers on a journey along the Overseas Highway from Key Largo to Key West meeting fishing guides and dive operators, environmental stewards, guides to historic attractions and artist