The Walking Dead gang is one of the friendliest and tightest-knit casts on television, and, happily for Jeffrey Dead Morgan, his co-stars extended those good vibes even to the man who was coming in to kill one — or more — of them. TWD stars Andrew Lincoln and Morgan visited the Yahoo TV studio at San Diego Comic-Con on Saturday, where Morgan shared how he first learned about the potential role on the show without knowing exactly who he might be playing. “They’re like, ‘Ah, it’s a secret, we can’t tell you,’” Morgan said, though, as a TWD fan who knows the comic book stories and characters, he guessed the character was Negan.