Trying to find a way to burn 43 minutes? Look no further than Dr. Horrible’s Sing-Along Blog, a brilliant Internet short film written and directed by Joss Whedon (Firefly, Buffy the Vampire Slayer).

Dr. Horrible(Neil Patrick Harris) is a wannabe super villain trying to join the esteemed Evil League of Evil, but all his attempts to be malevolent are foiled by his archnemesis, the superhero Captain Hammer (Nathan Fillion). Dr. Horrible also has to deal with his personal life, in which he is courting a crush on the sweet and innocent Penny (Felicia Day), a woman whom he sees at the laundromat but is too shy to talk to. When Penny begins dating Captain Hammer, Dr. Horrible has to juggle both establishing a connection with Penny and joining the League.

Insanely rewatchable, hilarious and filled with catchwy musical numbers, watching Dr. Horrible will show you why he has a Ph.D. in horribleness.