By James Hibberd
May 02, 2014 at 03:16 PM EDT

ABC’s Grey’s Anatomy enjoyed a ratings uptick for the return of Preston Burke. Thursday’s episode was up 13 percent from last week to win the 9 p.m. hour  and post a nine-week high (here’s our interview with Grey’s creator Shonda Rhimes about last night’s episode).

Yet Grey’s improving didn’t help the second episode of ABC’s new neuro-drama Black Box, which declined by the same amount, 13 percent (see chart). Another newcomer, CBS’ comedy Bad Teacher, fell a sharp 29 percent from last week’s debut.

Also: Fox’s American Idol sank 17 percent to another All Time Low. Idol has gone from invincible, to getting beaten by only Big Bang, to getting trumped by nearly half of the broadcast shows on Thursday night.

Full chart:

NET/TIME/SHOW  18-49 RATING Total Viewers (+000)
FOX 8-9P HELL KTCHN- 1.6 4,441
9:00P AM IDOL-TH- 1.5 6,917
9:30P SURVIVING- 1.0 3,910
ABC 8-9P GREYS-THU8- RS 0.9 4,141
9-10P GREY ANTMY- 2.6 8,693
10-11P BLACK BOX- 1.3 5,405
CBS 8:00P BIG BANG- 4.4 15,687
8:30P MILLERS- 2.1 9,579
9:00P TWO&HLF MN- 2.1 9,161
9:30P BAD TEACHR- 1.5 6,521
10-11P ELEMENTARY- 1.6 7,814
NBC 8-11P IHEART-AWD- S 1.7 5,449
CW 8-9P VAMPIRE DRS- 0.7 1,816
9-10P REIGN-CW 0.5 1,424