After Sunday’s Super Bowl, a special episode of New Girl drew an estimated 25.8 million viewers – good enough to make it the highest-rating scripted TV offering in three years (since Fox’s Glee occupied the same post-Super Bowl slot). It’s a far cry from the zenith days of such stunts, when an expanded post-game episode of NBC’s Friends in 1996 pulled in nearly 53 million viewers. But the enhanced exposure of New Girl ought to translate to additional viewers for tonight’s new episode, which guest stars Adam Brody. How many new viewers? Ay, there’s the rub.