1. Lost, May 23, 2010
Viewers of Lost expected all of their questions to get answered in the series finale. After all, they did dedicate six season to watching a show about mysterious numbers, polar bears, and even a smoke eating monster. Instead, fans found out something they had predicted since season one: everyone was dead. The final episode runs 100 minutes sans commercials and answered zero burning questions. Talk about almost two hours (two and a half if you watched it live with commercials) of your life you will never get back and to enjoy better series finales like Friday Night Lights or Six Feet Under.