6. The Well Walker
In the season two episode "Cherokee Rose", the surviving group are suffering from a water shortage, so T-Dog and Dale head out to a well which was previously used to supply cattle with water in order to get some for the rest of the group. When they get there, T-Dog is about to take a drink from the pump when Dale notices a hole in the planks covering the well. Hearing a familiar noise, he takes a look inside and sees an enormously bloated Walker stuck down the bottom. The Walker in question is memorable for the sheer grossness of it - it looked bloated and disgusting - and the fact that it had developed gills. The group gather to pull it out of the well and it tears in half, before T-Dog beats it to death with a shovel.