AMC's The Walking Dead will return on Sunday night with its highly anticipated season three finale, titled Welcome to the Tombs.

Following last week's episode of the series, the network dropped some spoilers and a sneak peek of what's to come. In the upcoming episode, Rick and the rest of the group will consider defending the prison as the Governor's (David Morrissey) inevitable attack comes near. Making matters worse, he still has Andrea (Laurie Holden) locked up at Woodbury.

However, Rick (Andrew Lincoln) will finally inform Michonne (Danai Gurira) that she is indeed one of them and they aren't looking to hand her over to the Governor any longer. The Governor will be getting his henchmen riled up to take out Rick and the entire prison crew, and he would very much like it if they ceased to exist any longer.

Woodbury's henchmen will shoot up the prison and at one point, the Governor and his soldiers will break inside the gates of the prison in what should lead to an intense showdown. According to The Stir, the season three finale "won't be what people expect," and almost all of the program's characters are indeed fair game when it comes to being killed off.

Departing showrunner Glen Mazzara said the current season was approached as an "historical novel" that would serve to build "the first major battle between surviving groups in the aftermath of this zombie apocalypse."

"Everyone's in play now, everyone's on stage, everybody has a stake in it and I think it'll be a very interesting, surprising ending for the fans. I know it won't be what people will expect but I think hopefully it'll be emotionally satisfying," Mazzara explained.

Dallas Roberts, who plays the role of Woodbury's Milton, dished to Wet Paint about the conclusion of the current season and what fans should expect from it.

"The Walking Dead fans will not feel cheated by the finale. It's not a soft close for sure," he said. "As [the season] starts to wrap up, it gets stronger, crazier and weirder. Although you'll never see it coming, when it cuts to black at the end of season three, there will be millions of mouths agape."

The Walking Dead finale episode is set to air at 9 p.m. EDT on Sunday, March 31, on the AMC network. A sneak peek of the finale can be viewed below.

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