'Claimed' (Season 4, Episode 11)
For all of the moral debates and inquiries into the nature of humanity at the heart of show, it's still meant to be scary — and few episodes are as white-knuckle petrifying as "Claimed." It sets up two parallel stories of survivors in immediate life-of-death situations: Glenn Rhee (Steven Yeun) finds himself trapped with a group of zealots; meanwhile, Rick tries to avoid detection by a band of marauders who've barged into the house where he's been living. Elsewhere in the neighborhood, Carl and Michonne (Danai Gurira) are off looking for supplies and bonding, getting ever-closer to returning to their now-occupied home. It's an hour of TV filled with tense standoffs and narrow escapes. Whatever it may lack in narrative momentum or depth, it more than makes up for in pure B-movie thrills.