ABC (3:30 p.m. ET)
Celebrities take to the hills again in this season’s launch of the 14-year-old program. Robert Duvall rubber-rafts down a never-before-navigated stretch of rapids in India. Olivia Newton-John spoon-feeds captive cheetahs with raw meat—and captive viewers with an ecology rap. There’s also affecting old footage with the compleat crooner-angler Bing Crosby. The grizzled pathfinder himself, Curt Gowdy, is still host.