Mercy is a term survivors have adopted in order to help ease the psychological impact of taking a life when granting it to the living, and neutralizing the undead when granting it to a zombie.
It is always in the form of a head shot, as this is the only way to neutralize a zombie, and ensure that a living recipient does not then become one.
The infected population is viewed as being in a state of endless suffering, and therefore ending that suffering is considered a merciful act.
"Mercy" is often granted to recently turned comrades and group members even when they pose no immediate threat. Mercy is also granted to the elderly upon their request - as in the case of Nana Grizwald of the Upstate New York survivor group. As resources are extremely limited, it is considered an act of heroism when an elderly member of a group chooses death in favor of increasing the odds of survival for those they leave behind. It's refered to as the 8th Sacrament.
A ceremonial recitation is given to the honored living, and is as follows:
"<name of recipient>, with this eight sacrament, I commit your soul to eternal peace. I give you: mercy."
- The term mercy is used in the opening credits song.
- The first episode ends with the song "Have Mercy" (Jason Gallagher).
- Mark Hammond ("Puppies and Kittens")
- Travis ("Fracking Zombies")
- Charles Garnett (Resurrection Z)
- Brandon Doyle ("Doctor of the Dead")