CBS's Supergirl premiered Monday evening, and Tuesday morning it's woken up to some positive ratings news.
Variety reports that 12.9 million people watched the show live in that 8:30 p.m. ET slot. Although it couldn't match the ratings juggernaut Big Bang Theory which preceeeded it, Supergirl retained 76% of the young adult demographics from that show, earning it the #2 spot in ratings overall for the evening.
58% of the 18-34 demographic were female for Supergirl's debut, but the male/female mix was more even at 48% when looking at the overall 18-49 age range.
Comparing it with other new shows that have debuted this fall, Supergirl ranked #1 for adults 18-49. For the entire year, Supergirl was only outmatched by the series debuts for Fear The Walking Dead, Empire and Better Call Saul.
Supergirl's ratings also puts it ahead of the debuts of other recent DC and Marvel superhero dramas. The CW's Arrow and The Flash earned 4.14m and 4.8m for their premiers respectively, while Fox's Gotham debuted to 8.28m viewers last Fall. Supergirl also edged out ABC's Marvl's Agents of S.H.I.E.L.D., which debuted to 12.12m viewers in September 2013.
Of course genre and particularly superhero TV shows tends to debut to high ratings given the curiousity factor. Supergirl's true test will what kind of legs it shows over the next several weeks and months.