Ratings Chart Attack!

Four of Thursday night’s six season premieres ranked as the lowest-rated in the series’ history, including “Survivor,” “Ugly Betty” and “ER.”

The two-hour season premiere of ABC’s “Grey’s Anatomy” brought in a 7.3 rating/18 share in the 18- to 49-year-old demographic, according to Nielsen Media Research. “Grey’s” slipped 18% from last year and was only one-tenth of a ratings point above its lowest premiere to-date, for its first season in 2005.

“Ugly Betty” (3.3/9) also returned, down 15% from last year for its lowest launch yet. ABC took home a 6.0/15, putting it in first place for the night.

“Survivor’s” (4.4/11) season premiere declined 12% year-to-year, marking the show’s lowest launch yet. CBS took in a 3.8/10 for the night.

Both “My Name Is Earl” (2.7/8) and “ER” (3.3/8) bottomed out against previous season premieres, although “The Office” stumbled only 6% versus last year with a 4.8/11. NBC took third place with a 3.6/9.

Facing stronger competition, Fox’s “Kitchen Nightmares” (2.1/5) dipped 25% from last week. A special “Nightmares” at 8 p.m. brought in a 1.9/5. Fret not, “Hole in the Wall” returns next week. Fox landed fourth with a 2.0/5.

The CW’s “Smallville” (1.7/5) slid just one-tenth of a ratings point week-to-week, while “Supernatural” (1.3/3) struggled against “The Office,” losing 24% from last week. The CW placed fifth with a 1.5/4.