The zombie drama's final episode for 2012 airs on AMC this Sunday (December 2) and on FX UK the following Friday (December 7).
"I will say it's not just about Rick (Andrew Lincoln) and [my character] the Governor," Morrissey told Vulture. "Lots of different relationships within those two communities explode and implode in the next episode. It plays out in a surprising way."
The English actor went on to admit that he does not perceive The Governor as evil, calling the villain a "troubled man".
"This man is trying to desensitize himself to this terrible world he's found himself in," the star claimed. "I think there is a conscience in there, a slight sense of troubled man. I really do."
> David Morrissey Walking Dead Q&A: 'The Governor will be complex'
Morrissey also revealed that he has received fan acclaim for his performance on Twitter.
"I get a lot of messages via that," he said. "They've all been positive, even the negative ones, which are basically, 'I hate your guts'. I take that as a positive thing!"
> Walking Dead exec on Tyreese: 'Chad Coleman would be terrific'
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Watch a clip from The Walking Dead below