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For its final season, HBO's Boardwalk Empire will jump ahead seven years. Although the trick is nothing new (Glee will also skip time for its final season, premiering midseason), it can produce mixed results. For every show that was creatively revitalized by the time jump, there are those that either lose their way or just simply fall right back into their old patterns. Need proof? Click ahead to see the best and worst TV time jumps.