+ The population of super-powered pretty people in NBC's rookie smash Heroes keeps growing every week. (We're so crushing on ''Google Girl,'' a.k.a. Hiro's waitress sweetie with the super-memory played by Jayma Mays.) And now EW has learned it'll keep booming into the new year. Christopher Eccleston who just completed a tour of duty on BBC America's Doctor Who will join Heroes in January in a top-secret recurring role. EW can also confirm that actor Zachary Quinto (so noTORIous) has been cast as mutant serial killer Sylar; he'll show his mug and speak a line in the Nov. 27 episode. Can Hiro (Masi Oka) turn back time and save ''Google Girl'' from Sylar's recent skull scalping? Hurry, Hiro! You're our only hope!