With a generous helping of cleverness and teen-girl moxie, CBS has followed the clues left behind the old grandfather clock in the spooky lighthouse and uncovered the biggest missing piece of its modern-day Nancy Drew show: Nancy Drew herself. This comes from Variety, which reports that Sarah Shahi will play the eponymous hero in Drew. Shahi, of corse, is not a teen girl, but that’s because Drew updates the character into being a 30-something detective for the NYPD instead of a plucky youngster. Also, making good on CBS’ promise that its Nancy Drew “will not be Caucasian,” Shahi comes from an Iranian, Persian, and Spanish background.