On the CW, the season two premiere of Arrow earned a 0.9 adults 18-49 rating and 2.74 million viewers, even with its May 2013 finale in adults 18-49 demo (0.9), up in adult 18-34 (0.8) and about event in total viewers (2.77 M).
It was down from last year's 1.3 adults 18-49 premiere rating but a series premiere always scores higher ratings, then it stabilizes.
The series debut of The Tomorrow People earned a 0.9 adults 18-49 rating and 2.32 million viewers, up one tenth from the premiere ratings for Supernatural last year in the timeslot.
The Tomorrow People retained Arrow demo and most of its audience is a good start and will be okay if it can hold up, the AmellWednesdays worked fine. Considering all the publicity and the recent casting news, I was hoping they would surprise everyone and both debut above a 1.0 but given the year every network is having, those are pretty respectable numbers for the CW.
Conclusion: Arrow and TTP ratings are decent, if not stellar.
Comparisons with other CW shows:
On Monday, the season premiere of Hart Of Dixie (3rd season) scored a 0.4, down three tenths from last year's 0.7 premiere rating and down two tenths from last season's 0.6 rating for the season finale.
The second season premiere of Beauty and the Beast scored a 0.3, also down sharply from last year's 1.1 adults 18-49 premiere rating, and down two tenth from the 0.5 the season finale earned (By comparison, Arrow did much better in its second season).
Conclusion: bad numbers for Hart of Dixie (it will probably get renewed for syndication reasons though) and Beauty and the Beast
On Tuesday, The Originals earned a 0.9 rating and 1.90 million viewers, down a tenth from its 1.0 adults 18-49 premiere rating. The season premiere of Supernatural earned a 1.2 and 2.50 million viewers, up from from last season's 0.8 adults 18-49 premiere rating.
Conclusion: still strong for The Original and whooping ratings for SPN (even if competition was weak in its timeslot)
On Thursday, the season premiere of The Vampire Diaries scored a 1.2 adults 18-49 rating and 2.55 million viewers, down 25 percent from a 1.6 for last year’s premiere on Thursday, October 11, 2012. The series premiere of The Originals garnered a 0.9 adults 18-49 rating and 2.15 million viewers, down 25 percent from a 1.2 for the series premiere of Beauty & the Beast.
Conclusion: quite disappointing for TVD and TO premieres, but these are still acceptable numbers
NBC's sci-fi show Revolution share the same audience and the same timeslot - 8pm Wednesday - as Comics-based Arrow, but it delivered poor ratings in the last three weeks: after matching a series low with a 1.8 adults 18-49 season premiere rating, the series hit a new low last week with a 1.6 adults 18-49 rating and again a series low this week with a 1.5 adults 18-49. Will Revolution continue to drop, or will we see it stabilize in the following weeks?
I would like to mention that Arrow is not a breakout hit or a rating hit as many online articles say, it's a simply a solid show. It may be the CW show with most viewers of all their shows but the only numbers that matters to advertisers are the adults 18-49 rating, and both The Vampire Diaries and Supernatural have better ratings than Arrow.
Side note: the number of viewers includes live and same day viewers.
Source of rating numbers: TV by the Numbers