Death episode: "Better Angels"; How it happened: After much debate about whether or not the group should accept or kill Randall -- an interloper from another camp who was considered a possible threat by many of the survivors -- Shane took the matter into his own hands, led Randall out into the woods and snapped his neck. Later on, Daryl and Glenn encounter Randall as a walker and Glenn finishes him off; Shock factor: Shane's cold-blooded murder was further proof he was completely off the reservation, but the most shocking thing was Daryl and Glenn running into walker Randall and discovering he hadn't been bit. That directly leads to Rick telling the group the secret he learned at the CDC: everyone is infected with the walker virus. You don't have to be killed by a walker to become a walker. You just have to die.
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