10x14 The Executioner's Song

No todos los asesinos son descendientes míos, y no todos mis descendientes son asesinos,
pero muchos lo son, los suficientes para saber que exterminarlos es lo menos que le debo a este mundo.

I really enjoy this episode.

I thought it was going to be one of those cliche episodes where Dean finds out that in order to rid himself of the mark of Cain that he has to destroy Cain. But So far it does not look that way.