Starring the sickeningly likeable Neil Patrick-Harris , the scrumptiously geeky Felicia Day and the smugly charming Nathan Fillion, Dr. Horribles Sing-Along Blog is a hilarious musical web series written and directed by Whedon. If you havent seen it, check out part 1 here: http://youtu.be/apEZpYnN_1g Capitalizing on the growing videoblog phenomenon, Dr. Horribles Sing Along Blog in its completion is more like an hour long TV episode but its well worth the 42 minutes youll waste on it.