Episode 10 of the fourth season is an all time favorite

I agree, Nipsey. Joss said he created it as a grim fairytale. The episode plays like a nightmare as they roam the quite streets and take out the heart's of victims. Its one of my favorites and keeps me entertained even though it's a silent movie.

Oh - yes, the episode called 'Hush'.
That's in my top 10 episodes for sure!
The 'Gentlemen' are brilliantly depicted.
The way they glide and move so elegantly whilst doing evil deeds is terrifying!