However, the episode's viewership ranked first in both its time-slot and the entire night, beating out CBS's CSI.
However, the episode's viewership ranked first in both its time-slot and the entire night, beating out CBS's juggernaut CSI.
A March 2007 report from MAGNA Global, based on NMR data about viewership ranked by among adults 25 54, shows that as of the time of the report 30 Rocks viewers have a median income of $65,000, high enough to place the show tied at 11th in affluence with several other shows.
In terms of viewership, "Invasion" ranked third for the night, just behind CBS's juggernauts CSI and The Mentalist.
In terms of viewership, "Flight" ranked fourth for the night, behind the season finales of Fox's American Idol, and CBS's Person of Interest and The Mentalist.
In terms of viewership, the episode ranked second in its 9 00 Eastern time-slot, just behind CBS' CSI, and third for the night, losing to CBS' The Mentalist and CSI.
The season aired as a lead-out to Ugly Betty, then in its second season, which aired on Thursday nights at 8 00 ET. Grey's Anatomy averaged 15.92 million viewers in its fourth season, ranking tenth in viewership.
The episode was originally broadcast on September 21, 2006 at 9 00 ET, and averaged 25.41 million viewers, ranking first in weekly viewership with a 9.0 rating, according to Nielsen ratings.
Of the top 10 media markets in terms of viewership, four were in North Carolina, two were in Virginia and one was in Maryland, with the Washington D.C. market ranking second highest in television viewership.
The series was a critical and commercial success, with an average viewership of over 30% in addition to ranking as the top program consistently every week after its debut.
