Synopsis by Mark Deming
During a game of "Capture the Flag" at a church outing, Homer Simpson (voice of Dan Castellaneta) becomes aware of how weak and flabby he's become. In a rare burst of self-improvement, Homer joins a gym, and discovers Teutonic action hero Rainier Wolfcastle (voice of Harry Shearer) works out there on a regular basis. Wolfcastle becomes Homer's training partner, and Homer follows his lead in wolfing down Powersauce bars, energy snacks made from applesauce. Homer actually loses a few pounds and gains some impressive arm muscles after a few month at the gym, and he's approached by Brad (voice of Brendan Frasier) and Neil (voice of Steven Weber), two marketing men with Powersauce's corporate headquarters. Brad and Neil persuade Homer to climb the Murderhorn, Springfield's tallest mountain, as a publicity stunt to promote Powersauce, and Homer agrees, despite the panicky objections of Marge (voice of Julie Kavner) and Grandpa (also voiced by Dan Castellaneta). To insure Homer's safety, Brad and Neil arrange for a pair of sherpas to tag along and do the hard work, but when Homer sends them home to prove he can scale the summit on his own, everyone is convinced he's done for. "King Of The Hill" first aired on May 3, 1998.