Firefly. Now, don't get me wrong, Serenity was a GREAT movie, and a fantastic ending to the series-- but imagine the storyline of Serenity doled out in little 44 minute chunks over a five year period. The cliffhangers. The jokes. The carnage. The pain, the delicious delicious pain.
Imagine Wash getting impaled, Zoe saying, "Honey?", and then getting SEE YOU NEXT SEASON.