Warning! If you haven't seen the Season 3 finale of The Walking Dead, entitled "Welcome to the Tombs", this article will include spoilers. David Morrissey has signed on to be a series regular in Season 4 of The Walking Dead.

In the finale, The Governor skipped town with Martinez (Jose Pablo Cantillo) and Bowman (Travis Love), after slaughtering practically everyone who was with him after they questioned his methods.

In Robert Kirkman's comic book series, the Governor does not survive his showdown with Rick Grimes (Andrew Lincoln). Since he will be a series regular, it stands to reason that The Governor's plight will play an integral part in the Season 4 story line. Earlier this season, Robert Kirkman teased in an interview that The Governor may be coming back for Season 4.

"The potential is always there -- or he could die in the next episode. This is The Walking Dead; you never know."

In an interview after last night's finale, Robert Kirkman spoke about the decision to kill off Andrea (Laurie Holden), and how The Governor will move forward.

"Aside from reaffirming the unsafe nature of the show, it's a bleak show and the message we're trying to send is Andrea would go to any length to save those people and she ended up sacrificing her life for them. Speaking to the character of Andrea, it was showing how devoted she can be and how things, despite all of her best intentions, went awry. We've got a lot of work to do with the Governor (David Morrissey) next season. Having him be that diabolical and sinister will serve his character moving forward and that was a pretty important and defining moment for him that will pay off in the fourth season."

He also teased that he likes the mystery of The Governor looming out there somewhere, and Rick never knowing where he is.

"We've definitely got more story to tell with that guy. I always liked the idea of seeing him again and not having a clear resolution to that conflict. Rick and the group are still at the prison and the Governor is still out there. There's more ground to mine. Knowing the Governor isn't dead is going to weigh on these characters when we come back in season four and we'll have to see where things go."

Without going into too many specifics, Robert Kirkman revealed that Season 4 is going to be a much different season when compared to Season 3.

"It's going to be different in a lot of ways. We'll see a very different Rick Grimes for one. His experiences against the Governor and with the various things that happened to him in Season 3 are informing his character in huge ways. We'll see a lot of familiar elements from season three: we'll see the prison, Rick and his group are still in the same place but those elements are all going to be radically different. I can't really get into it but Season 4 is going to be extremely different than season three in some very startling and cool ways."

Production is scheduled to begin in May on Season 4 of The Walking Dead in Atlanta.

In related news, AMC has released a slew of new photos from last night's "Welcome to the Tombs" for your viewing pleasure.