12. Justified, Season 1 (FX; March 16, 2010 - June 8, 2010)
Justified's first season wasn't bad by any stretch—in fact, many critics had the show on their year-end top ten lists. Justified began as a series of one-offs, with Raylan (Timothy Olyphant) dishing out justice, and bullets, to a new bad guy each week. As the show grew, it appeared that the writers learned what they had in some of their supporting actors—like Walton Goggins, who plays the fiery Boyd Crowder—and began to see potential for sustained drama in Harlan County.
Late into season 1, Justified moved to a more serialized approach, focusing in on the tension between Boyd and Raylan. The choice to serialize Justified and limit the number of one-off episodes set the stage for the phenomenal second season of the show, which launched the show to a level we hope it never comes down from.