NBC Enterprises has cleared its new hourlong talker “The John Walsh Show” for a fall 2002 syndie debut on all 13 NBC O&Os as well as a number of Hearst-Argyle TV stations.The NBC O&Os include local TV stations in Gotham, Los Angeles, Chicago and Philadelphia. The Hearst-Argyle stations that have picked up the show include outlets in Boston, Kansas City, West Palm Beach and New Orleans. Deals so far rep coverage of about 40% of the country. Studio- and field-based skein, starring “America’s Most Wanted” host Walsh, will focus on both topical and social issues and travel as stories happen. NBC Studios is producing, and NBC Enterprises is distributing.