 According to Nielsen ratings , " You 're Gonna Love Tomorrow " was watched by 18 @.@ 684 million viewers and held an 11 @.@ 4 rating / 17 share on its original American broadcast on September 28 , 2008 . The episode was watched in 13 @.@ 105 million total households . It was number one in its timeslot , beating Sunday Night Football on NBC , Cold Case on CBS , and Family Guy and American Dad ! on Fox . The episode was the most @-@ watched program of the night in both total viewers and the young adult demographic . It was the second @-@ most watched program of the week across all networks by viewers 18 to 49 years old , behind Grey 's Anatomy , and the second @-@ most watched program in total viewership , behind Dancing with the Stars . The episode also performed better than any original broadcast of the series since January 2008 . It outperformed the fourth season finale by two million total viewers and showed a 17 percent increase in viewers 18 to 49 years old . At the time , the episode was the least @-@ watched season premiere of the series , falling half a million viewers from the fourth season premiere , " Now You Know " , a year earlier . However , " You 're Gonna Love Tomorrow " outperformed " Now You Know " in the demographic of women between 18 and 34 years of age with an 8 @.@ 3 rating / 20 share in that demographic . In the United Kingdom , the episode premiered on Channel 4 on October 22 , 2008 . It was watched by 2 @.@ 39 million viewers , becoming the sixth most @-@ watched program of the week on the channel . 
