Fast National ratings for Wednesday, April 8, 2015.

A special Wednesday airing of "The Voice" took a massive bite out of FOX's "American Idol," which stumbled to ugly numbers, but couldn't stop "Survivor" from carrying CBS to victory in the key measures.

On the more positive side of the ledger, that "Voice" airing helped give NBC's "Law & Order: Special Victims Unit" a boost, though "Chicago PD" couldn't hang onto that momentum and dropped a hair.

And with "Modern Family" out for a week, ABC's comedy block posted some small declines as well.

On to the numbers...

Among adults 18-49, CBS averaged a 1.9 rating for Wednesday night, edging out NBC's 1.8 rating in the key demographic. ABC was third with a 1.6 key demo rating, followed by FOX's 1.4 key demo rating. The CW's repeats averaged a 0.3 key demo rating for Wednesday.

Overall, CBS had a little bit more wiggle room, averaging an estimated 9.24 million viewers and a 5.5 rating/9 share for Wednesday primetime. NBC was second with 7.87 million viewers and a 5.0/8 for the night. FOX's 6.52 million viewers and 4.2/7 and ABC's 3.7/6 and 5.805 million viewers followed. The CW averaged 1.08 million viewers and a 0.7/1 for the night.

8 p.m. - "Survivor: Worlds Apart" won the 8 p.m. hour with 9.58 million viewers and a 2.3 rating among adults 18-49 for CBS, topping the 9.54 million viewers and 2.1 key demo rating for NBC's "The Voice." ABC was third with "The Middle" (7.19 million and a 1.8 key demo) and "The Goldbergs" (6.46 million viewers and a 1.9 key demo). FOX's "American Idol" averaged only 5.99 million viewers and a 1.3 key demo rating (compared to 8 million and a 1.7 key demo for the comparable hour last week). The CW's "Arrow" repeat averaged 1.15 million viewers and a 0.3 key demo rating.

9 p.m. - "Criminal Minds" averaged 10.08 million viewers and a 2.0 rating among adults 18-49 to keep CBS in the lead for the 9 p.m. hour. NBC's "Law & Order: Special Victims Unit" averaged 7.31 million viewers for second and tied for second with a 1.8 key demo rating. FOX's "American Idol" was third with 7.06 million viewers and fourth with a 1.5 key demo rating, compared to ABC's repeat of "Modern Family" (5.78 million and a 1.7 key demo) and a new "Black-ish" (6.06 million and a 1.9 key demo). The CW's "Supernatural" repeat averaged 1 million viewers and a 0.3 key demo rating.

10 p.m. - "CSI: Cyber" averaged 8.06 million viewers to win the 10 p.m. hour and finished second with a 1.4 rating among adults 18-49. NBC's "Chicago PD" was second with 6.755 million viewers and won the hour with a 1.5 key demo rating. ABC's "Nashville" averaged 4.67 million viewers and a 1.1 key demo rating in third.

[UPDATE: In Live+Same Day Finals, "Survivor" ticked up to a 2.5 rating among adults 18-49 and to 9.84 million viewers. "The Voice" was also up to a 2.2 key demo rating and 9.64 million viewers. "American Idol" stayed at a 1.4 in the key demo, but rose a tiny bit to 6.58 million viewers. In the 10 p.m. hour, "CSI: Cyber" rose to a 1.5 key demo rating to tie "Chicago PD" for the hour.]

All ratings information comes from preliminary Fast National Nielsen data, which includes live and same-day DVR viewing. All numbers are subject to change.

A long-time member of the TCA Board and a longer-time blogger of "American Idol," Dan Fienberg writes about TV, except for when he writes about movies or sometimes writes about the Red Sox. But never music. He would sound stupid talking about music.