The numbers have varied naturally over the seasons but the viewership numbers (via Nielsen) for new episodes can be anywhere from over 12 million to 5.5 million.
The very high premiere numbers generally don't represent the rest of the season.
For instance, The first episode of Season 4 received 11.85 million viewers but dropped to 9.7 million for the second.
Season 8's first episode received 10.1 million viewers but the next highest number was only 9.6
and Season 9's highest was 9.4 and the next highest was 9.2 then the third was only 8.8 million.
Season 9 ranged from 9.2 million to 5.8 million.
Season 8 ranged from 9.6 million to 6.1 million.
Season 7 ranged from 9.9 million to 7.3 million.
Season 6 ranged from 11.5 million to 7.6 million.
Season 5 ranged from 9.3 million to 7.2 million.
Season 4 ranged from 11.85 million to 5.7 million.
Seasons 1, 2 & 3 numbers have apparently been lost to the ether (I couldn't find a lot) but,
Season 3 averaged ??? viewers
Season 2 apparently averaged 6.3 million viewers.
Season 1 apparently averaged 12.8 million viewers.
This occurs in season 6 of Family Guy.
Season Four & Season Eight
Season 4, episode 10.
There are a lot of songs that have been featured in Family Guy, far too many to list them here. Do you have a specific season or episode?
Model Misbehavior | Season Four
21
Meet the Quagmires is episode 18 of season 5 of Family Guy.
The sixth season.
22.01 million viewers watched the first episode that followed the Super Bowl
A Very Special Family Guy Freakin' Christmas was in Season Three.Road to the North Pole was in Season Nine.
Season Seven
season 7
The exact number of Family Guy fans can never be known when you consider the show is seen worldwide & gains more fans each year with new episodes & reruns but looking at the ratings on FOX, this season has ranged from one point eight million to four million viewers so there's a small indicator of the fans.
Season 6
Family Guy started airing in HD in its 9th Season.
Season 5
Fourth Season