1 of 15Lost
Sure, Lost's time-tripping fifth season was the most difficult to follow (at times even we had headaches and nosebleeds), but it also provided many weighty moments for the characters we've grown to love. Sawyer took on a leadership role and gave his heart to Juliet; Hurley helped Miles reunite with his long-last father; Jack finally tested the water of being a man of faith; and John Locke is, well, still dead. Throw in the introduction of Jacob and the death of Daniel Faraday, and it's no wonder why we're so eagerly anticipating the next and final season.
Photo By: Mario Perez/ABC