Simple, as most of my threads turn out to be. Now, I do believe the episode of the office (US ver.) "Goodbye, Michael". This episode is a culmination of so much emotions and memories and special moments, and it all released in a wave of happy tears and sadness. And, it marks the first major drop in quality for most of the shows key aspects. So, it was just an overall very vital and important episode. Alright, now please explain your favorite episode of your favorite show. GO!