From TV Guide:
Quote
Thanks for the scoop on The Walking Dead! I'm confused about the trailer though. Why did Andrea tell the Governor about the other survivors?! —Helio
NATALIE: I feel you! There's no way Andrea would betray the group like that, right? "It's not that easy," executive producer Gale Anne Hurd says of Andrea and Michonne's presence in Woodbury, promising that the trailer isn't giving you all the information. But never fear, Rick & Co. will be prepared for what's coming. "The Governor is a dangerous character, and what's interesting is that the folks in the prison are also dangerous characters now," added showrunner Glenn Mazzarra. "Rick and Daryl and the people are willing to do what they need to do to survive, so it's great to set these two forces against each other."
From Ausiello:
Quote
Question: Got any intel on The Walking Dead‘s midseason finale (a.k.a. Season 3, Episode 8)? —Pam
Ausiello: The shock and awe you’ll feel while watching the episode will quickly give way to dread, according to exec producer Robert Kirkman. “It’s definitely going to be something that will make you hate the winter and be dying for the second act of the season to start,” he shares, “which is a fun process that I think adds to the anticipation and excitement of the show. I don’t want to spoil anything or promise too much, but I’m very proud of the episode and I think people are really going to dig it.”