According to reports, the CW has ordered nine more episodes of Supernatural 's lead-in, The Vampire Diaries.
The Vampire Diaries series premiere (September 10) set a series debut record for the CW, with 4.8 million viewers, giving the network its best Thursday among women ever. On its second week, the vampires series ranked a strong second in the 8pm hour among target women 18-34 (2.6/9-tie), behind only CBS.
After two weeks with the new Thursday lineup, Supernatural improved over its year ago performance by +18% in adults 18-34 (1.3/4), 55% in women 18-34 (1.7/5), +17% in women 18-49 (1.4/4). The combination of The Vampire Diaries and Supernatural have improved the CW's Thursday performance versus a year ago by 47% in women 18-34 (2.2/7) and 6% in women 18-49 (1.8/5).
Source: SF Universe, Variety.com, The Futon Critic.