By James Hibberd
Updated October 25, 2011 at 06:01 PM EDT

Zombies rule: AMC has just renewed The Walking Dead for a third season.

The decision comes after only two episodes have aired of season two, but it’s still no surprise — the show’s premiere had more adults 18-49 than any other drama in basic cable history. (And for once, AMC has managed to renew a show without a protracted hand-wringing negotiation!).

Ratings for Sunday’s second episode: 6.7 million total viewers, 4.5 million adults 18-49. Including repeats, the full count climbs to 8.8 million viewers. That’s down 8 percent from the premiere (and down 20 percent if you include the repeats), but hell, at these levels TWD can still give viewers away like Halloween candy.

Read more:

Robert Kirkman talks last night’s ‘Walking Dead’

InsideTV Podcast: Rick Moranis to join forces with ‘The Walking Dead’? Robert Kirkman and Steven Yeun explain

‘Walking Dead’ season 2 delivers record premiere ratings