TV viewers are sophisticated. They want to be challenged. They want to analyze and ponder while they sit in front of the tube watching the primetime lineup, right? Um, no. Obviously, there are some successful shows that really make us think, but it seems NBC’s “Million Second Quiz” has simply managed to puzzle viewers instead of intrigue them. With its viewership declining daily, the obviously pricey endeavor may be NBC’s latest programming mistake. On its Monday premiere night, the hyped 8 p.m. hour-long game show saw only 6.5 million viewers, according to Deadline Hollywood. By 8:30 p.m., more than 500,000...