DON'T MISS: "The Walking Dead" – As the monster hit returns to resume its eighth season, our mood is somber. That's because the last time we were in the company of our zombie apocalypse survivors, poor Carl Grimes (Chandler Riggs) had been chomped on by a walker. With death now imminent, we can only sit by helplessly to see how his fate plays out. Have the tissues handy. (9 p.m. Sunday, AMC).