AMC's "The Walking Dead" is at its best when it's moving at a break neck pace. Fans don't need bogged down storylines that require ten or twelve episodes to develop; what they need is a constantly revolving door of challenges to overcome in rapid succession. Take the second half of season six, for example. With just four episodes remaining, we've already been introduced to a fan favorite from the comics, seen Rick and Michonne fulfill every viewer's dream, and been teased with the biggest of bads. And the show isn't done yet.

"Walking Dead" director and producer Greg Nicotero promises there is more to come. More exciting romance, more action and more on the mysterious Negan fans have been waiting so long for. To that last point first, here's what Nicotero had to say on when we may finally see Negan (Warning: spoilers for last night's episode).

"What we do very, very well on The Walking Dead is we leave a very clean trail of clues that allows the audience to start putting things together. So, the fact that Glenn sees the Polaroids is meaningful because that's clearly evidence that these guys are not screwing around. In terms of whether we've seen Negan in that compound or not, I don't think we did. I think if we did, he'd probably be dead because they did a pretty good job of expunging everybody that they found at the compound but they still don't know who or what he is. It's a weird kind of, 'I am Negan,' 'We are Negan,' kind of thing."

On Carol's new romantic love interest and how it may impact Daryl:

"I think Carol is trying to normalize her life. You know, Tobin is a great guy. When she's like, 'Are you messing with me?' and she's kind of flirting with him a little bit...I don't imagine Daryl would have an issue with that. I don't know why he would. Daryl's got his own stuff that he has to deal with, so, I don't know."

Finally, on Rick's morality in season six:

"I don't know how I would determine whether they're a good group or not a good group, especially if I was witnessing them raid this compound and kill everybody in it. I would be very curious to see what people perceive Rick as. Clearly, he's got a team. He's got a pretty significant group behind him but if you were watching from a far, I don't know that you'd be able to say that Rick is genuinely a good guy or not. These people are doing what they need to do to survive, just like any other group out there needs to do. The question is, who's gonna get the upper hand?"

"The Walking Dead" airs Sundays on AMC at 9 pm ET.