Eugene Porter's (Josh McDermitt) mullet hairstyle has been a hot topic on the Twitterverse since the character was introduced in the tenth episode of "The Walking Dead" Season 4. And now, on the sneak peek for this week's episode, even Glenn (Steven Yeun) could not help but ask the scientist, "Why the hair?"

"It's still pretty mullet-based - and I'm trying to push it in that direction," McDermitt told Channel Guide magazine in September when asked what kind of conversation he has had with fans. "I'm trying to kind of brand it [laughs]. I'm doing these 'mullet chats' on Twitter - whenever I hit a milestone in followers, I'm like, 'Oh, let's do a mullet chat and talk about stuff.'"

And now the "mullet-based" conversation has reached the actual show.

"Well, first things first, I was pretty upset when I read that in the script that Glenn is not respecting the mullet and I quickly went to the writers and asked them to change that," McDermitt joked to Access Hollywood. "But I think we'll see more about the mullet. I love that it's kind of becoming a centerpiece, not just [in] the Twitterverse, but also within 'The Walking Dead' universe, just like, we're talking about it, we're addressing it because it is this interesting thing: this scientist comes out and he's wearing a mullet. It's like, 'Why do you have a mullet?'"

Meanwhile, the fourth episode of the season beat NBC's top-rated "Sunday Night Football" in the key adult demo.

"Slabtown" attracted 14.5 million viewers and an incredible 7.6 rating among adults 18-49, while "Saturday Night Football" delivered about 17 million viewers and a 6.1 in the demo, according to Entertainment Weekly.

"That's supposed to be the premiere game of the week and 'The Walking Dead' is beating it. It's a little bit of justice for me just because I kind of rode the bench when I played football, so I'm kind of like, 'Yeah! In your face, football,'" McDermitt told Access Hollywood.

But seriously speaking, McDermitt said that they do not really talk about the ratings that much.

"We think it's great and we'll get an e-mail from one of our executive producers saying, 'Oh my gosh, you guys, you're shattering records!' and we're like, 'Wow this is awesome,' but like you said, we have so much work to do, it's the last thing on our mind," he explained. "We're not doing it for the ratings, we're not doing it to try and boost the visibility of the show... That's awesome, we love it, but really we don't pay attention to it. If we did, the show would suck."