Ratings: Walking Dead Finale Breaks Records, Once Upon a Time Ticks Up, GCB Drops

The Walking Dead‘s Season 2 finale — which TVLine readers have given an average grade of “A” — delivered a 5.8 household rating on Sunday night, making it the highest-rated episode in the series’ history. And with 9 million total viewers, the sophomore finale grew more than 50 percent in audience over the freshman capper.

Similarly, TWD‘s 6 million viewers in the 18-49 demo marks a 50 percent gain versus the Season 1 finale, and the season-ender’s total audience hits 10.5 million viewers when you fold in Sunday’s encore broadcast.

Season to date, The Walking Dead averaged 6.9 million total viewers, with 4.6 mil landing in the 18-49 sweet spot — up 32 percent from Season 1.

Post Mortem: Walking Dead Boss Dissects Killer Finale, Talks [Spoiler]’s Arrival, ‘Spoils’ Season 3

Meanwhile, over on the broadcast networks…..

A rousing episode of ABC’s Once Upon a Time — bratty Snow is kinda sexy, amiright? — led the Big 4 in the demos with a 3.0 rating, gaining a tenth week-to-week, while drawing 8.6 million total viewers.

Leading out of that, the Desperate Housewives funeral was attended by 9 million total people (up 7 percent), though dipped a tenth in the demo (to a 2.5). Capping the night for ABC, GCB (6.3 mil/2.0) was down 12 percent.

Turning to NBC, Harry’s Law (7.9 mil/1.1) dropped 10 percent in audience but was flat in the demo, while Celebrity Apprentice (5.8 mil/1.8) was down 10 percent across the board.

CBS’ numbers are thoroughly scrambled by a 43-minute delayed start, but best any reasonable man can guesstimate, Amazing Race was steadyish, Good Wife looks up (?) and the not-yet-renewed CSI: Miami was (maybe?) down.

Finally, Fox’s The Simpsons (5.24 mil/2.4) and Bob’s Burgers (4.4 mil/2.1) saw week-to-week gains, while Family Guy (5.7 mil/2.8) and American Dad (4.6 mil/2.2) were flat.

What were you tuned into this Sunday night?