Warning: There are spoilers ahead for "The Walking Dead" mid-season premiere, "Adaptation."INSIDER breaks down some of the smaller moments you may have missed on the return of AMC's zombie series, including a callback to the season seven premiere and an iconic comic scene."The Walking Dead" is back and we finally have our first real look at the show's new threat, The Whisperers.But while the group bid a final farewell to Jesus and Negan was exploring the world after more than six years in a jail cell, you may have overlooked a few details, including a crucial callback to the brutal season seven premiere.Executive producer and director Greg Nicotero and showrunner Angela Kang join INSIDER to point out some smaller moments you may have missed on Sunday's return of AMC's "The Walking Dead."If Negan's new shirt made you do a double take, there's a reason why.There's only one man who wore shirts like that'That was one of Rick's shirts!If that tan shirt looked familiar, episode director Greg Nicotero confirmed to INSIDER Negan was wearing one of Rick's shirts. He got it while breaking into Michonne's home while she was out of town."He finds himself in Michonne's house, he goes into Judith's room, he takes Rick's shirt, and he takes a hat because he's trying to disguise himself," said Nicotero.There's a reason the Whisperers didn't just go after everyone at the cemetery.The Whisperers have a great way to blend in with zombie hordes, but there's one big downside: It puts them at a disadvantage when trying to fight another group while also trying to stay undercover."If they start acting like humans, they will be found out," Nicotero said of the Whisperers making any sudden movements around the real undead."That's one of the reasons why the scene in the cemetery in the beginning was challenging. If the Whisperers execute any big moves that would alert the other walkers around them that they are human and they're blowing their cover," he continued. "So we had to be really cautious about how they moved and how quickly they moved. I didn't want it to look like there was a million stunt people running at our characters all the time."See the rest of the story at Business Insider Click here to read full news..