The new show premiered on CBS with 12.9 million viewers in a special 8:30 ET/PT according to preliminary Nielsen figures, making it this fall's biggest new-series opener.
And it brought in 3.2% of adults ages 18 to 49, winning its first half-hour and narrowly behind NBC's The Voice in the second.
Supergirl held onto 81% of Big Bang's 15.9 million viewers, and 76% of its young-adult lead-in.
The producers promised that the show will definitely pass the Bechdel test -- a test that examines whether or not two female characters in a piece of fiction talk to each other about something other than a man. Aside from looking up to her mentor, the hard-edged, but impressive Cat Grant, Kara will find a friend in Lucy Lane, played by Jenna Dewan Tatum, and the two will embark on adventures together.
Pretty impressive since the pilot leaked months ago.
Source 1, Source 2