The Walking Dead introduced viewers to The Governor this week, as David Morrisey came on board this AMC hit in that famous graphic novel role.

On next Sunday's installment, look for characters to get to know the mysterious villain especially well, as Merle makes an appeal to the man in charge of Woodbury. Watch the official network teaser now for "Killer Within."

Elsewhere, it's not all about blood and gore and guts. Sometimes, it's just about... sex in the guard tower. Check out Rick and company giving Glenn a hard time in this sneak peek:

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