Thursday's TV highlights: 'The Gong Show' on ABC
30 for 30 The new documentary “Mike and the Mad Dog” salutes the longtime sports-talk radio duo. 5 p.m. ESPN, 10 p.m. ESPN2
America’s Got Talent Judges Simon Cowell, Mel B., Heidi Klum and Howie Mandel look back at memorable moments from the current season. 8 p.m. NBC
Penn & Teller: Fool...