THURSDAY, JULY 21, 2016 ABC 8:00 p.m. “BattleBots” 9:00 p.m. “Greatest Hits” 10:00 p.m. Republican National Convention” CBS 8:00 p.m. “The Big Bang Theory” (R) 8:30 p.m. “Life in Pieces” (R) 9:00 p.m. “Big Brother” 10:00 p.m. Republican National Convention” NBC 8:00 p.m. “Spartan: Ultimate Team Challenge” (season or series finale, two hours) 10:00 p.m. […]