Nucky Kills Jimmy (Season Two, Episode 12)
Under the ruse of having captured Manny Horvitz, Nucky lures Jimmy to the Atlantic City War Memorial on a dark, rain-swept evening. But when Jimmy arrives, the Great War veteran knows that the time remaining in his life can be measured in minutes. All of the amends Jimmy tried to make throughout the episode wound up being for naught, because Nucky was unable to forgive his former protégé for turning against him. But as Nucky betrays the man whom he treated like his own son by shooting him twice in the head, he confirms the truth he had been dodging since the series' pilot, when Jimmy told him, “You can't be half a gangster.” The murder of Jimmy by Nucky's own hand signals a new era of Boardwalk Empire: Nucky Thompson has now betrayed himself, his associates and his loved ones by morphing into a cold-blooded killer.