‘The Walking Dead’

Sunday, 9 P.M., AMC

Walkers and Wolves may lurk in the woods outside the gates of Alexandria, but the biggest threat to the humans within comes from among themselves as the horror blockbuster returns for Season 6. Rick Grimes (Andrew Lincoln) and his company have become so battle-hardened they are reluctant to trust the apparent safety of their new home, and Rick’s vocal resistance begins to cause a schism among the

Alexandrians. Lennie James also stars.

Andrew Lincoln stars in Season 6 of “The Walking Dead,” premiering Sunday on AMC.