Four days before the official start of the fall season, the CW has already launched three of its four new series. The latest, The Secret Circle, opened last night with 3 million viewers and a 1.3/4 in adults 18-34. It was even with last fall’s premiere in the time slot of Nikita among adults 18-34 but down 16% in total viewers and a tenth in adults 18-49 as Nikita is a little broader and older-skewing. Secret Circle edged the Nikita premeire in women 18-34 (1.9/5) by 6% to post the network’s all-time high in the slot in that demo. The Secret Circle‘s lead-in, the third-season premiere of CW’s flagship drama The Vampire Diaries (3 million, 1.6/5), was down 11% in total viewers and 16% in 18-34 from last fall’s premiere but built on the May finale. Secret Circle and Vampire Diaries — which share Kevin Williamson as executive producer and Alloy books by L.J. Smith as source material — showed good compatibility, with Secret Circle retaining 100% of the Vampire Diaries audience. But the real test for the two shows will come next week, when they will face all-new competition, including Fox’s The X Factor. The only original offering on the Big 4 last night was the two-hour finale of ABC’s Wipeout (2.2/6 in adults 18-49), which was down 19% from last September’s two-hour closer. It finished tied for second place for the night in 18-49 with a Big Bang Theory repeat, with another Big Bang rerun (2.6/8) topping the rankings. ABC (1.8/5, 5.6 million total viewers) finished tied with CBS (1.8/5, 8.1 million) for the night in 18-49, while CBS was No. 1 in total viewers.