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Axel (Lew Temple)
Death episode: "Home"
How it happened: After spending the episode opening up to Carol, last prisoner standing Axel was shot in the head mid-sentence when the Governor stages a mini-attack on the prison to show them who's boss.
Shock factor: It wasn't much surprise that Axel didn't survive the season, but the timing and cause of his death was definitely designed for maximum shock value.