“So You Think You Can Dance” may have dominated “America’s Got Talent” in adults 18-49 all summer, but among total viewers, NBC’s talent will waltz away the big winner.

“Talent’s” first-season finale averaged 11.8 million total viewers last night at 9 p.m., according to Nielsen fast nationals, the broadcast networks’ best showing in total viewers since the Major League Baseball All-Star Game last month.

Among 18-49s, “Talent” averaged a 3.5 rating, its best Thursday showing of the season. It bettered its usual Thursday average of 2.5 by 40 percent and was up 30 percent over last week.

“Talent” won its timeslot in adults 18-49, though only by 0.2 over a rerun of CBS’s “CSI,” which also had its best performance in weeks. That may owe to the fact that Fox showed football last night instead of “Dance.” “Dance” had dominated the slot up to its final Thursday appearance two weeks ago.

“Dance” averaged a 4.3 final rating and 10.65 million total viewers for Wednesday’s finale. Thus far it’s the summer’s highest-rated finale in 18-49s. The penultimate episode of “Talent” that same night averaged a 3.3 rating and 11.63 million total viewers.

Bianca Ryan, the 11-year-old golden-voiced crooner, won the $1 million grand prize on the Simon Cowell-produced show, which returns to NBC at midseason.

Meanwhile, CBS was No. 1 for the night among 18-49s with a 2.9 rating and 9 share, followed by ABC at 2.6/8, NBC at 2.5/8, Fox at 2.1/7, Univision at 1.8/5, WB at 0.8/2 and UPN at 0.6/2.

At 8 p.m., CBS was No. 1 at 2.7 for "Big Brother 7: All-Stars," ahead of a 2.2 for Fox's NFL exhibition game, and 2.0 each for ABC's "Grey's Anatomy" rerun, NBC's reruns of "My Name Is Earl" and "The Office," and Univision's "La Fea Mas Bella." The WB's "Smallville" repeat averaged a 0.8, followed by UPN's reruns of "Everybody Hates Chris" and "Love, Inc." at 0.7.

At 9 p.m., NBC took the lead at a 3.5 for the "Talent" season finale, followed by CBS's "CSI" repeat at 3.3, ABC "Grey's" repeat at 2.8, Fox's NFL game at 2.1, Univision's "Barrera de Amor" at 1.8, WB's "Supernatural" repeat at 0.7 and UPN's reruns of "Eve" and "Cuts" at 0.6.

At 10 p.m., ABC's "Primetime" led at 3.1, ahead of CBS's "Without a Trace" rerun at 2.7, NBC's "Windfall" at 2.2, its best rating in weeks, Fox's NFL game at 2.1 and Univision's "Aqui y Ahora" at 1.5.

Among households, CBS led for the night at a 6.2 rating and 11 share, followed by ABC at 5.5/9, NBC at 4.9/9, Fox at 4.1/7, Univision at 2.1/4, WB at 1.2/2 and UPN at 1.1/2.