The BEST episodes written by Dan Merchant
#1 - Zunami
Z Nation - Season 1 - Episode 8
As they travel across Nebraska, the group finds themselves trapped in a morgue as a literal zombie tsunami engulfs them; at the same time, Citizen Z gets a visitor who might not be who he seems to be.
#2 - The Siege of Murphytown
Z Nation - Season 3 - Episode 12
Warren leads an attack against Murphytown to extract its smug leader.