After weeks of massive pre-launch campaign, Fox’s Glee returned big, scoring its highest-rated episode ever. Airing after American Idol following a four-month hiatus, the high school dramedy drew a 5.6 rating, almost 50% higher than its preview after Idol last spring. The show retained an impressive 77% of its Idol (7.3, 20.6 million) lead-in. There was more encouraging news for NBC’s midseason drama Parenthood (2.5), which won the 10 p.m. in the 18-49 demo over two other freshman series, ABC’s V (2.3/6), which hit a series low, and CBS’ The Good Wife(1.4), which aired a repeat.