If you can submit a full episode I'd say chapter 17-2 is a good bet. The scene where Angel and Kalani are at the army base, and they realize they are being hunted is amazing!There's also the scene where they get cornered by the behemoth. And to make it even better that same episode had Michael/Pegs/Kelly found signs of other survivors (the colony).

There's a lot of zombie action here, and there are some really dramatic moments too.