Ian recently previewed his cameo with a behind the scenes look at the production of the series in an episode of his horror FX show for Nerdist, "Scott Ian's Bloodworks" (formerly "Blood & Guts").

A huge fan of the genre and the show, Ian previously appeared in a "Walking Dead" webisode in 2011. "I read the comic," says Ian. "I started reading Walking Dead when it came out and then the show came on. I'm a massive fan of the show. I just felt like, from the start, [that] it would be the coolest f***ing thing if I could ever get to be a walker.

"I got to do the webisode thing and that was awesome, and I remember [producer] Greg [Nicotero] telling me at one point that 'everyone in the business wants to come be a walker, so we kind of put the kibosh on all of that'. I figured that at least I got to the webisodes, that's cool enough. I didn't think it would ever happen."