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12. Terry Crowley, The Shield
Before you get all, "What about Lem and the hand grenade?" let us explain. Yes, Shane blowing his partner to bits was an amazing twist, but it came five seasons into one of the riskiest and brutal TV series we've seen. We practically expected it. On the other hand, Vic Mackey popping a fellow cop to cover up his unit's misdeeds in the series' pilot caught us completely off guard and provided a small taste of things to come.